<b>Dynamic Allocation quietly outranks your header bid</b>

<b>Dynamic Allocation quietly outranks your header bid</b>

Confirmed: GAM's dynamic allocation lets Google demand compete against your header bid using a temporary CPM that doesn't have to clear the same line-item priority rules. A high header bid can still lose to AdX if the allocation logic values the Google bid's predicted yield higher.

— Header bid wins the wrapper but loses inside GAM
— Predicted-yield logic isn't visible in your reporting

Impact: compare header-bid win rate in the wrapper vs. actual rendered share in GAM — the gap is the tax. (confirmed)