SEO & Content
DOI
Double Opt-In — a subscriber must confirm their email before being added to a list.
DOI, Double Opt-In, is a subscription model where a user must confirm their signup — typically by clicking a link in a verification email — before being counted as a lead or added to a list. The extra confirmation step filters out typos, bots, and low-intent signups, producing smaller but far cleaner lists and, in affiliate offers, a lead the advertiser can trust actually exists.
For buyers running sweepstakes, dating, or mobile content offers, DOI payouts run noticeably higher than SOI precisely because conversion is harder: every user who abandons the confirmation email is a click you paid for that never monetizes. The economics hinge on your confirmation rate — weak email deliverability or a confusing confirmation flow can gut it. Test whether the higher DOI payout actually beats SOI volume for your traffic source.
In buyer speech
“The DOI payout looks juicy but our confirm rate from pop traffic is like forty percent — SOI probably nets out better.”