Single vs double opt-in: the tradeoff reads

Single vs double opt-in: the tradeoff reads
A framing line first: this isn't a morality question, it's a list-economics one. The best pieces treat it that way.

📥 Swipe
— GetResponse's confirmation-rate study — made the cut because it quantifies the leak: ~10-30% never confirm, so double opt-in trades raw size for a cleaner base.

🚀 Deliverability
— Litmus on engagement signals — worth your time for the long-game argument: confirmed lists keep inbox placement that single opt-in slowly erodes.

🧪 Tests
— Hidden double opt-in writeup — picked it for the clever compromise: confirm only when the signup looks risky (free webmail, no engagement).
— Spamtrap-risk primer — earned its spot by naming the real danger single opt-in invites: typos and bots that poison your sender rep.

Verdict from the stack: paid traffic leans double, owned/branded traffic can survive single.
Saved you ~2 hours.