Multi-channel attribution is not a suite purchase. Join affiliate exports to ads and brand-search windows first: co-movement is a signal to investigate, not a cut.
Direct traffic isn’t a compliment—it’s the junk drawer where private shares dump un-attributable clicks. Learn to measure dark social without perfect data.
After a clicks-vs-commissions mismatch, map every redirect hop, prove your affiliate ID survived, and separate merchant clawbacks from mid-chain tracking breaks.
Signup-wall handoff break: domain scope, session renew on auth, param strip, email/OTP and social-login variants. Diagnose with merchant new-customer flags and a DevTools hop walk.
