Quarterly remnant quality letter
Plan for a calendar-quarter letter that restates what we measured, what we still cannot measure, and what we changed. No invented quarter yet.
Published 2026-09-09 · Search job: remnant inventory quality
Status: recurring plan. First letter ships at the end of a calendar quarter that contains at least one judged remnant window. Q3 2026 is not closed on this page. We will not write a fake September 9 letter that pretends the quarter is done.
What each letter will open with
- Windows included, spend observed, and coverage (full, partial, or unknown).
- Whether IVT was attached. If it was not, the letter says so in the first screen. It does not bury "zeros because unmeasured" under a CTR chart.
- Concentration: placements that spent with zero clicks, and domains that produced a large share of clicks.
- Click-to-page-view if the join existed. Otherwise an explicit gap.
- Watchlist changes: names added, names that repeated (
msn.comalready has two flights), names we stopped listing because a later measured window contradicted the CTR flag. - Trafficking changes we made, each with a revert path, judged KEEP or REVERT. Unjudged changes do not appear as wins.
Numbers this letter may reuse until a newer judged window exists
Only the already-published August 2026 Supply Bench slice: 1,149 placements, 1,535 domains, 93.4 percent zero-click placements, $202.77 / 64 percent of observed spend, seven domains at 41.3 percent of clicks from 4.7 percent of impressions, $0.48 unauthorized ads.txt, reseller 0.423 versus direct 0.184, OPENX 0.111 percent to SMARTADSERVER 3.074 percent. Plus anonymized main-seat IVT 0.523 / 1.544 percent and click-to-page-view 15.85 / 3.75 percent.
No new quarter averages. No invented industry remnant quality index.
The letter exists so a returning reader can see what changed since the scorecard without us turning Lab into a newsletter.