My concern was not with the popup, they are merely annoying and often can be killed with a bit of a setup of popup or script blockers. It was more that several sites were being called and for me scripts from 3rd party sites are always forbidden.

If my virus / spyware /adware goes off on a renderosity page , I will be blaming rendo, not a 3rd party site.

You have the top banner for ads, now you think you need a pop-up too.

By the way, while that was active , my version of Firefox was crashing often.  I dont know it was the extra stuff, but it stopped crashing when the ads stopped appearing. It was the usual "Firefox has encountered a problem and needs to terminate" message , so no clue what was bothering it.