Our read: popunder vs interstitial — pick by vertical, not by CPM
The spreadsheet that ranks formats by raw CPM lies to you on pops.
— Popunder wins on sweepstakes, utilities, push-subscribe flows: the user finishes their action on the publisher page, your offer loads behind. Friction-light, fires once per session cap.
— Interstitial wins on app installs and high-AOV nutra: forced viewport, full attention, but timer-skip kills your CTR if you don't pre-load the LP under 1.5s.
Rule of thumb we keep hearing from media buyers: if your LP needs reading, interstitial. If it needs a click, popunder.
— confidence: high
Pop Wire
@pop_wire