I get those little pop ups on the pics too but not every one. What I'm talking about is different. My phone starts going off and the whole page pops up. It's only on tff so it's got to be in their system. I've also noticed this site going really slow since it started.
It is a bug in the advertisement server. You can fix it temporarily by clearing your phone's browser's cache. It will come back, but you can get rid of it for a little while. They find the issue, fix it, and then another one takes it's place.