Glossary
SOI
A conversion counted when the user submits a form once, with no confirmation step. Easy to convert, easy to fake, so SOI offers pay less and watch quality after the fact.
Also called: single opt-in.
SOI is the simplest lead: name and email, submit, done. Dating, sweepstakes and survey offers use it to get volume. Because nothing is confirmed, the advertiser judges the traffic by what the leads do later and cuts sources whose leads never open a mail.
Against DOI, SOI converts two to three times better and pays about that much less.
Related terms: DOI, CPL, Lead, Sweepstakes.