adprime/zeroOpen account
GlossaryArticleOperator-judged

Open exchange

Unreserved remnant auctions across SSPs. The default path our public display tests have actually flown.

Published 2026-09-09 · Search job: open exchange advertising

Open exchange is the unsold, unreserved auction path. Many publishers, many SSPs, leftover banner slots. You are not buying a guaranteed package. You are bidding on what is still for sale.

That is the path Adprime Zero first tests use. It is also why CTR misleads. Leftover inventory is good at producing clicks. Our August 2026 Supply Bench pull (partial coverage) found 1,149 placements, 93.4 percent with zero clicks taking 64 percent of observed spend, and seven domains at 41.3 percent of clicks from 4.7 percent of impressions. Unauthorized ads.txt spend was $0.48. No IVT vendor was attached.

Open exchange is not a private marketplace and not a deal. You can still curate after you see grain: inventory-source allowlists, placement and site excludes. You cannot pick the zero-click list before the first flight. That is the argument for scan-then-exclude.

The mapped writeup is open exchange waste. Dated numbers live on the scorecard.

Related

Supply
Open exchange waste, mapped by grain

There is no Beeswax object named supply route. Waste shows up in reports by placement, site, domain, and exchange, and only some of those grains can be excluded today.

Glossary
Remnant

Leftover inventory that was not reserved. Open-exchange display is remnant. It is useful for tests and easy to misread.

Benchmarks
Supply Bench wave scorecard

Dated remnant scorecard from August 2026 Supply Bench waves. Partial coverage. No IVT vendor. Not an industry average.

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