Playbook: audit GAM key-values before you hit the limit

Playbook: audit GAM key-values before you hit the limit
Confirmed: networks silently stop accepting new keys near the cap, breaking line item targeting.

— Export all custom keys and their value counts
— Archive keys with zero deliveries in the last 90 days
— Collapse free-form keys that should be predefined to cap cardinality
— Flag any key feeding header-bidding price buckets — never archive those
— Re-test a sample line item's targeting after each batch archive

Impact: hitting the key-value ceiling blocks new bidder integrations cold. sourced