AdTech AdTalk

The Juice is Dripping

Feb 27, 2026
They dig into the chaos of supply path optimization and why ads.txt and sellers.json sometimes block legitimate publisher agents. The Digiday whistleblower and the hidden world of principal-based buying and rebates get a sharp, skeptical look. They debate The Trade Desk’s soft guidance and whether its old bidding advantages still matter in a modular, AI-driven ad tech world.
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INSIGHT

SPO Rules Created More Harm Than Clarity

  • Supply Path Optimization (SPO) initiatives like sellers.json and ads.txt created confusion and led buyers to blindly block legitimate publisher agents.
  • Gareth explains reseller vs direct distinctions caused publishers (e.g., Raptive) to be wrongly optimized away, hurting inventory access.
ADVICE

Hire Experts To Unpack Agency Rebates

  • Brands should demand transparency and hire consultants to unpack rebates and principal buying arrangements.
  • Adam recommends advertisers involve groups like MediaLink or McKinsey to understand money flows and renegotiate conflicts of interest.
ANECDOTE

Agency Rebates Forced Wasteful Search Bids

  • Gareth recounts being on search teams pressured to hit agency rebates, forcing wasteful bid inflation.
  • He describes bidding up search keywords to meet rebate floors even though search volume can't be manufactured.
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