The programmatic advertising industry, a sector built on the promise of efficiency and data-driven targeting, is facing a critical examination of its commitment to transparency. A recent incident involving Check My Ads, a nonprofit dedicated to acting as an independent watchdog for the industry, highlights a growing tension between the stated ideals of openness and the practical realities of platform access. Despite the industry’s vocal advocacy for transparency, Check My Ads was reportedly denied a coveted seat on a Demand-Side Platform (DSP) – the very technology that facilitates programmatic ad buying – after initial enthusiasm soured when the watchdog group’s investigative intentions became clear. This situation raises significant questions about the boundaries of transparency in ad tech and the potential for self-preservation to override stated ethical commitments.
The core of the issue lies in the inherent desire of DSPs to meticulously vet potential buyers before granting them access to their platforms. No legitimate advertising technology vendor wishes to facilitate ad placements for untrustworthy advertisers or those engaged in fraudulent practices. This vetting process is a standard and necessary component of maintaining a healthy and secure advertising ecosystem. However, the narrative shifts when a DSP’s apprehension stems not from concerns about the buyer’s financial stability or potential for fraud, but from a fear of the buyer delving too deeply into the platform’s intricate supply chain. This scenario, as experienced by Check My Ads, appears to contradict the industry’s pervasive rhetoric championing transparency.
Check My Ads, for years, has cultivated a reputation as a staunch advocate for integrity within programmatic advertising. Its COO, Arielle Garcia, noted that numerous ad tech vendors have readily publicized their collaborations with Check My Ads, leveraging these partnerships as tangible evidence of their own dedication to transparency. Yet, when Check My Ads sought to transition from an external observer to an active participant—by requesting an actual DSP seat to conduct its own inventory analysis, mirroring the actions of any other buyer—this move was apparently perceived as a step too far by at least one unnamed DSP.
Evidence of this strained interaction emerged through emails reviewed by AdExchanger, provided by Check My Ads. These communications confirm that a DSP, which has chosen to remain anonymous, ultimately refused to onboard Check My Ads, even after both parties had formally executed a Master Service Agreement (MSA). The initial engagement, according to the correspondence, was marked by a high degree of eagerness from the DSP. In a clear demonstration of their interest, the DSP even waived its standard minimum spending requirement, a significant concession that underscored their perceived value of Check My Ads as a partner.
A Shift in Stance: From Eagerness to Apprehension
The trajectory of the relationship took a sharp turn before Check My Ads could even initiate its first campaign. The DSP experienced a sudden bout of "cold feet," leading them to terminate the arrangement. The official reason cited was discomfort with "the scope of protections extended to our vendor and supply partners." This justification, however, has been met with skepticism by Check My Ads, which views it as a veiled attempt to shield its supply chain from scrutiny.
This instance marked Check My Ads’ inaugural formal pursuit of a DSP seat, as confirmed by Garcia. The organization’s primary objective in seeking this access was multifaceted. A significant driver was to enhance its research into programmatic buying practices. By operating directly within a DSP, Check My Ads aimed to gather firsthand data and insights that would inform the development of best practices for smaller advertisers, helping them to avoid wasteful spending in their programmatic campaigns. This aligns with their recent publication of a comprehensive report on Google’s Performance Max, which was based on their direct operational experience with the platform.
Furthermore, Check My Ads harbors ambitions to eventually offer "agency-lite" managed services to small advertisers on a nonprofit basis. This initiative necessitates having the technical expertise and operational capacity of a traditional agency, which includes the ability to utilize a DSP like any other buyer.
Beyond its research and service-oriented goals, Check My Ads also sought a DSP seat for more fundamental reasons: to bolster its own promotional efforts. In addition to its watchdog and research functions, the organization actively runs campaigns to market its services, disseminate its newsletters, and promote its branded merchandise, such as apparel.
Iesha White, Director of Intelligence at Check My Ads, who brings a decade of experience as a media buyer to her role, emphasized the critical need for hands-on technical expertise. "It’s important for Check My Ads to have technical expertise and stay current with how the industry is evolving," White stated. "In order for us to do that, we have to have skin in the game and spend money." This sentiment underscores the organization’s pragmatic approach to understanding the intricacies of programmatic advertising.
White’s personal history with the unnamed DSP proved instrumental in initiating the engagement. Having previously purchased ads through the platform, she reached out to a contact within the DSP earlier in the year to explore the possibility of obtaining a seat. The initial response, as indicated by the email exchanges, was overwhelmingly positive. The DSP provided a platform demonstration in April, following which White’s contact sent a summary of the meeting’s key takeaways, explicitly mentioning the agreement to waive the minimum spending requirement.
The DSP subsequently forwarded an MSA for Check My Ads to sign in mid-May. AdExchanger’s review of this document confirmed its execution by both entities. Crucially, the post-demo recap email also articulated a clear understanding of Check My Ads’ objectives for securing a DSP seat. It read: "Your objectives: Moving beyond Google PMax / Demand Gen into ‘real’ programmatic with full transparency and control, no black box. Running small but meaningful test campaigns ($1k–$20k/month range) for your own research and analysis, and for select advertisers where you can learn and potentially generate revenue. Evolving over time into a selective mini-agency model. (woot woot! SO honored you’re thinking of us)." This statement suggests an initial alignment of goals and a shared vision for the partnership.
Navigating Supply Partner Protections: A Point of Contention
However, the collaborative spirit that characterized the early stages of the negotiation began to wane. On May 20, White’s contact at the DSP sent an update, informing Check My Ads that their DSP seat should be live within the following week. In the interim, the DSP requested further details regarding planned test campaigns, the specific brands involved, anticipated budgets, and overall campaign objectives.
White responded on May 21, explaining that Check My Ads was still in the process of securing commitments from potential brand clients. She did, however, disclose their intention to run their own brand lift campaign, as well as a Cost Per Acquisition (CPA) campaign aimed at driving newsletter sign-ups. The budget for this CPA campaign was set at $1,000, well within the range previously approved by the DSP.
A subsequent follow-up from White on June 3 for a status update yielded a less definitive response. Her contact replied that they were "still confirming next steps." A new, probing question was then introduced: "In the meantime, I have one last question: If you identify any vendor performance concerns on [redacted], can we agree to loop us in first before escalating externally?"
This question immediately raised a red flag for Check My Ads. They interpreted it as a sign of suspicion regarding their intentions and a clear indication that the DSP was growing uncomfortable with granting a platform seat to an organization whose explicit role is to scrutinize and expose industry issues. White responded by reaffirming their standard operating procedure: "We would absolutely inform [redacted] of any supply issue first, and we would reach out to any impacted SSP vendors, as is our standard practice."
Despite this reassurance, a follow-up inquiry from White on June 5 received an unequivocal rejection. The DSP’s head of client partnerships formally stated that the platform had "decided not to move forward with this partnership." The explanation provided was that, "As we worked through the agreement, we weren’t able to get comfortable with the scope of protections extended to our vendor and supply partners. We have an obligation to consider the downstream impact on them before bringing on new clients, particularly in cases where the nature of the research or activation may intersect with those partners in ways that fall outside what our MSA covers."
Garcia expressed her profound disappointment with the DSP’s decision to unilaterally terminate the partnership after an MSA had been mutually signed. The head of client partnerships responded, acknowledging their personal advocacy for the partnership and their regret at the inability to find a resolution. They further explained that the decision was made at a higher organizational level, driven by feedback from the DSP’s supply and legal teams that had been raised internally on May 20 and could not be resolved. The concluding remark offered a glimmer of hope: "I respect what you’re building, and I hope our paths cross again under different circumstances."
The Nuances of DSP Vetting and the Transparency Conundrum
To provide a balanced perspective, it is crucial to acknowledge that the vetting of potential buyers by DSPs before granting platform access is a standard and often rigorous procedure. DSPs are entitled to assess the financial health and operational integrity of any prospective client. In some instances, DSPs may conduct their own financial audits. An ad tech consultant, speaking on condition of anonymity to offer candid insights into DSP onboarding processes, suggested that if the DSP had identified any financial red flags in Check My Ads’ recent filings, this could have contributed to their hesitation. However, Garcia explicitly stated that the DSP never initiated any such financial audit of Check My Ads.
The paramount concern articulated by the DSP revolved around the protection of its supply partners. The precise nature of these protections, and from what exactly they were intended to shield these partners, remained unspecified. Check My Ads was left to infer that the DSP’s apprehension stemmed from the prospect of a watchdog group actively investigating its supply chain.
The consultant acknowledged this as a potentially valid concern for any DSP. "No DSP is going to knowingly onboard a party whose stated purpose is to turn that seat into an exposé," they remarked. This perspective highlights the inherent conflict when a transparency watchdog seeks direct access to a system it aims to scrutinize.
Nonetheless, this reluctance to grant access to a reputable transparency organization presents a stark contrast to the industry’s ceaseless pronouncements on the imperative of transparency. The gap between rhetoric and action in this instance is particularly conspicuous.
A Pattern of Hesitation: Broader Industry Reluctance
The unnamed DSP’s withdrawal was not an isolated incident. Check My Ads revealed that other programmatic platforms had also expressed interest in collaboration, only to subsequently retreat. In one instance, another DSP, which also requested anonymity, had approached White for an appearance on a joint podcast. Following the recording, White inquired about gaining access to the DSP’s platform for testing purposes. This request was met with a refusal.
A similar experience unfolded with Thrad, a platform specializing in ad placements within generative AI responses. Emails shared with AdExchanger by Check My Ads indicated that Thrad had initially approved Check My Ads for platform use. However, Thrad later raised concerns regarding Check My Ads’ campaign setup. These included the selection of sensitive targeting categories—such as politics, abortion, mental health, and LGBTQ issues—where Thrad stated it was unable to place contextual LLM response ads. Additionally, the Check My Ads merchandise storefront was not configured for European shipping, despite the campaign targeting European audiences.
Even after White removed the sensitive targeting categories and rectified the storefront issue, Thrad declined to launch the campaign. Thrad CEO Andrea Tortella subsequently communicated to Garcia that Check My Ads did not align with their ideal customer profile. Thrad did not respond to multiple requests for comment from AdExchanger on the matter.
Collectively, these incidents suggest that the programmatic industry’s professed commitment to transparency has discernible limits, according to Garcia and White. Check My Ads is finding itself at the forefront of these limitations. Despite these setbacks, the organization remains committed to forging partnerships with any DSP willing to engage in good faith and contribute to making programmatic advertising more accessible and equitable for small businesses.
"If there are any DSPs out there that are confident in their supply and want to help us make programmatic accessible to small businesses," Garcia stated, "reach out to us." This call to action underscores their ongoing mission and their belief in the possibility of genuine collaboration. The industry’s response to this appeal will be a telling indicator of its true dedication to the principles it so frequently espouses.
Update 7/23/26: This story was updated to clarify that Check My Ads did record a podcast with a second DSP that later refused to grant the organization a seat on its platform. The original report incorrectly stated that Check My Ads refused to record the podcast unless it was granted a seat on the DSP first.
