Forum Moderators: martinibuster
Site may not include:
Pop-ups, pop-unders or exit windows that interfere with site navigation, obscure Google ads, change user preferences, or are for downloads. 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
I would add that pop-ups are a much-hated intrusion that will probably cost you more in lost opportunity than they earn you. But they don't appear to conflict with the TOS.
I'd leave a site with popup's. its instrusive and harmful to your computer resources... it makes me want to find the site that caused the mess and block it from my mind.