The lead  ·  01

Publisher ad supply fell up to 40% in Q2 — the traffic collapse has reached the P&L

Ozone data covering ~20 billion impressions across its premium network (The Guardian, News UK, WSJ) shows publisher ad requests fell 32–37% YoY in the US and 39–41% in the UK in Q2 2026.

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The week in one paragraph

This was the week the numbers stopped adding up. Last week the industry was busy buying the pipes; this week we found out what’s actually flowing through them — and how little of it anyone can measure. The supply itself is contracting: Ozone’s data shows publisher ad requests down 32–41% year over year in Q2 and programmatic spend down 30.6% across the US and UK, as AI search intercepts the user before they ever reach your page. The money that remains is being spent into instruments buyers openly distrust — the IAB pegs US digital video at $80 billion while 67% of buyers say they lack confidence in open-exchange inventory. The measurement layer is buckling in parallel: Nielsen ONE and VideoAmp both withdrew from MRC accreditation, only 23% of residential IPs reach their intended geography, match rates have fallen below 10% for some clients, and the MMM tools filling the vacuum — Google’s Meridian and Meta’s Robyn — are authored by the very platforms whose inventory they score. Meanwhile the giants kept scaling on their own terms: Netflix’s ad business is on track to roughly double to $3B even as it cuts its public engagement reporting to once a year, and Stagwell built its own AI curation marketplace to decide which publishers get spend. But the most important thread is what publishers did about it. SPUR’s publisher-run content telemetry standard — BBC, FT, Guardian, Sky, The Times, now the AP, 30 members deep — is open for public comment through July 24, the SAIL ledger launched to track AI usage against IAB Tech Lab’s pay-per-query framework, Axios, Forbes, Future, Time and The Washington Post started selling AI visibility as inventory, book publishers sued Google over Gemini, the EU ordered Google to share its Search data and open Android to rival AI, and Reddit said out loud what everyone is thinking — that the AI licensing cheque might be cannibalizing the ad business it was meant to subsidize. One thread ties it together: when the industry’s own numbers stop being credible, the publishers who win are the ones who build and control the meter.