I have never really found any success with pop unders. I can only seem to get things profitable with pop overs.
I am wondering if others have had the same results. Also if you have had profitable pop unders did you do a different style lp or same as you would with pop over.
My thoughts are pop unders are hidden and only show to the user once they close their browser which is generally when they are done interacting online and therefore less likely to stay on longer to fill out any offer or buy anything.