<b>Confirmed: the pop vs popunder 'engagement' gap is mostly a measurement artifact</b>
Popunder looks like it converts worse because the user sees it on tab-close — delayed by minutes. Your attribution window clips conversions that land after the session 'ended,' so you under-credit popunder and over-credit pop.
The fix: widen the postback window to 24h+ and segment conversion-time distribution by format. Most buyers find popunder's true value sits in the 5-min-to-2-hour tail they were never counting.
— confidence: high
Pop Wire
@pop_wire