Our read: blanket bid vs per-GEO-tier routing on a pop source
One CPM across all GEOs is the lazy default, and the source loves you for it — they dump tier-3 fill into your tier-1 budget.
— Tier-1: bid high, route direct, prelander on.
— Tier-2: mid bid, smartlink with a payout floor.
— Tier-3: rock-bottom bid or block — the postback noise isn't worth the cents.
The tell that you're being farmed: your 'US' campaign converts at tier-3 rates. Pull a GEO breakdown weekly; sources quietly reclassify inventory and your blended ROI rots without a single setting changing.
— confidence: high
Pop Wire
@pop_wire