Traffic & geos
SOI (Single Opt-In)
Lead-gen offer paying on email submission.
SOI (single opt-in) is a lead-gen offer that pays the affiliate when the user submits their email and clicks a confirmation link once. Common in sweeps, dating, and lead-aggregation. Lower payouts than DOI but easier to convert.
Example
Sweepstakes SOI at $1.20 payout on push: 8% LP-to-form CR, $0.008 CPC → EPC $0.096. Volume kills.