

Episode 137: The big debate around Transaction IDs with Chris Kane and Mike O’Sullivan
38 snips Aug 29, 2025
In a lively discussion, Mike O’Sullivan, co-founder of Sincera, and Chris Kane, founder of Jounce Media, dive into the contentious world of transaction IDs in ad tech. They explore how these IDs can harmonize ad requests and streamline auctions while addressing publisher concerns about revenue loss and data privacy. The duo debates the influence of The Trade Desk and the pressing need for transparency and standardization in the industry. They also tackle the complexities of auction duplication and underline the importance of engaging with buyers to enhance understanding of market dynamics.
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LinkedIn Post That Started The Fire
- Mike O'Sullivan's innocuous LinkedIn post asking why publishers might oppose transaction IDs ignited a big LinkedIn uproar.
- That post prompted publishers to publicly argue the case against TIDs and sparked this podcast debate.
What A Transaction ID Actually Does
- Transaction ID (TID) harmonizes multiple SSP bid requests into a single auction identifier across the supply path.
- That lets buyers map duplicate requests to the same square on a page and analyze duplication and quality.
Duplication Distorts Who Gets Spend
- Widespread request duplication shifts spend toward publishers that generate more duplicated bid requests, not necessarily higher-quality inventory.
- Transaction IDs would reveal duplication and could reallocate spend to genuinely higher-quality publishers.