Dentsu, Publicis, WPP Abandon The Trade Desk Over Billing Audit
Dentsu, Publicis, WPP pull from The Trade Desk over billing audit. A watershed moment for platform accountability in Asia-Pacific advertising.
The three biggest advertising holding companies in the world just sent a unified message to one of the industry's most celebrated ad-buying platforms: clean up or lose the money.
In March 2026, Dentsu, Publicis, and WPP all pulled back from The Trade Desk's OpenPath, a premium supply channel designed to give brands more direct access to ad inventory. It is the first time in programmatic history that all three top holding companies have moved against the same platform simultaneously.
What triggered it was not a data breach or a scandal. It was a billing audit.
Publicis Found Charges Clients Never Agreed To
Publicis commissioned an independent review of its contract with The Trade Desk. The audit found fees applied to charges they were never meant to cover and clients enrolled in tools without their consent.
The Trade Desk denies the findings, pointing to its SOC 1 compliance certification. Publicis advised clients to stop spending with the platform. TTD's stock dropped more than 70% from its 52-week high, and rival platforms launched campaigns pitching themselves as the transparent alternative.
One agency executive put it plainly: "If the agency couldn't look its clients in the eyes and explain to them with total confidence how much they were paying, and what exactly they were paying for, then it followed they'd have to step away from the product until further notice."
The Trade Desk's Overconfidence Problem
The frustration runs deeper than one billing dispute. The Trade Desk built its reputation on being the "pure player" in programmatic, a platform that doesn't own media and theoretically free of the conflicts that compromise Google or Meta.
That promise crashed when the company launched Kokai, an AI-powered upgrade to its buying interface. Instead of cutting costs, Kokai drove campaign costs up 10-15% for some advertisers. One buyer spending US$40 million a year reported pulling 90% of their budget after being locked out of the legacy system.
"Your CEO can't spend the last 10 years on LinkedIn saying you're the only pure player in the space, you're the white knight and then all of a sudden you try to cut out supply partners out of the environment. People call you on that bullshit." That was said by an anonymous programmatic marketer at the Digiday Programmatic Summit in 2026.
Google and Meta Aren't Off the Hook
Brand and agency executives at the same summit were equally frustrated with Google's Performance Max and Meta's Advantage+.
In one documented PMax campaign, Display ads consumed nearly 50% of the total budget while delivering under 20% of conversions. Advertisers had no mechanism to reduce that allocation. Google has added channel-level reporting since, but as one analysis noted: "You can now see things you still can't change."
Meta's Advantage+ modifies ad creatives without prior approval. One advertiser's highest-performing ad was replaced by an AI-generated image of a cheerful grandmother. The platform also re-enables targeting settings that advertisers explicitly turn off, sometimes reaching audiences 15 million people wide. In pharma, that is a compliance emergency.
What This Means Beyond the Budget Dispute
Research cited in industry coverage suggests only 36 cents of every dollar entering a DSP reaches a consumer. Nearly 57% of marketers say their confidence in data from these platforms is declining.
Mission Media
The stakes are higher in Asia Pacific. The APAC programmatic market is worth US$258 billion in 2026 and growing. Connected TV ad fraud rates in the region run at 36%. APAC buyers face the same black box platforms with less leverage and fewer resources to audit them.
The backlash is no longer a niche complaint from programmatic specialists. It is becoming a financial governance question that reaches all the way to the CFO.
