Observed Signal · May 27, 2026 · Analysis · Source: AdExchanger · Impact: 3/5 · Sentiment: Negative
Critics Say Email-Based IDs Don’t Work for CTV
AdExchanger examines industry skepticism about using email-based alternative IDs for Connected TV (CTV). Critics say email IDs, while viable as cookie replacements for display, are ill-suited to CTV’s one-to-many viewing contexts and often rely on third‑party-sourced emails rather than publisher first‑party logins. The article spotlights a recent Unified ID 2.0 (UID2) encryption error at The Trade Desk that rendered a publisher’s UID2 tokens useless for three months, and reports firsthand accounts that some FAST channels and publishers purchase emails from data brokers to build IDs. Experts including Mike Richter and Ana Milicevic call for greater transparency, stronger QA/governance, shared test harnesses and improved measurement to validate ID integrity and performance in CTV.
Raises measurable concerns about identity integrity, transparency and performance measurement for email‑based IDs in CTV — issues that affect adoption and trust across buyers, publishers, and ID operators.
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Key Takeaways & Evidence Grounding
- The Trade Desk oversees an email-based alternative ID called Unified ID 2.0 (UID2).
- A UID2 encryption error at a CTV publisher produced unusable tokens for roughly three months; fixing it reportedly produced no obvious revenue lift.
- FAST channels and some publishers often lack direct email logins and have, according to sources, purchased emails from third‑party data brokers to create email-based IDs.
- A report by the Coalition for Innovative Media Measurement, Go Addressable and Truthset found IP-to-email match rates average about 16%.
- Industry experts (Mike Richter; Ana Milicevic) urged more transparency, independent verification, and repeatable test harnesses for alternative ID systems in CTV.
Connected Companies & Entities
6 Entities mappedOntology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
UID2: The Future of CTV Advertising Unveiled
UID2 is becoming essential in connected TV (CTV) as advertising shifts from third-party cookies toward open Web identity solutions. Walled Gardens offer scale but higher costs and opaque measurement, boosting interest in ID-based approaches. Procter & Gamble reportedly tested UID2 implementations from NetID and Utiq, signaling rising ID relevance. An ID5 study finds 91% of market participants already use cookie alternatives or plan tests, and 67% focus on IDs for non-addressable traffic. In Europe, UID2 is often called EUID, a governance/hosting/compliance layer atop UID2. UID2 promises reduced waste, more precise lookalike models, and stronger omni-channel activation, especially across CTV and mobile, with tight DSP integration via The Trade Desk. Reported performance uplifts of 20–30% versus cookies and CPA-focused metrics in iGaming reinforce UID2’s industry case.
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