GOL-RR-2026-001 · September 2026
The Unlocked Shelf: Supply-Path Governance Among America's Largest Retail Media Operators
We checked twenty of America's biggest retailers. One blocked every attempt to look, leaving nineteen that answered.
Nine of the nineteen that answered, nearly half, cannot prove who is allowed to sell ads in their name. That means fake ad space using their names has nothing standing in its way, and the brands paying for it have no way to tell real from counterfeit.
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