Forum Moderators: martinibuster
....... Other types of pop-ups, pop-unders, or exit windows may be allowed, provided that they do not exceed a combined total of 5 per user session
So the answer appaers to be "maybe".
I am hoping by next year, most of the people online will be using updated web browsers to block the pop-ups.
I tried pop-ups a few years ago, and only made a small fraction of what I earn now from AdSense.
So the moral of the story is - Do Not Use Pop-Ups!