Traffic & geos
Tier-1 (T1) traffic
High-CPM English-speaking markets — US, UK, CA, AU, NZ, IE.
Tier-1 is the affiliate-marketing convention for high-spend, high-CPM English-speaking markets — US, UK, Canada, Australia, New Zealand, Ireland. Native CPCs are highest here, conversion volumes are richest, and most cash-paying offers target T1 only. Tier-2 = mid-CPM (Western EU, JP, KR, IL); Tier-3 = low-CPM (LATAM, SEA, MENA, EE).
Example
Same supplement offer at $89 AOV: T1 cleared $0.34 CPC and $48 CPA. T2 (DE/FR/IT) cleared $0.12 CPC and $19 CPA — 3× better unit economics, 1/4 the volume.