I use Fire Fox with Adblock Plus. An add on for FF. Never a problem, even when watching a streaming pool event.
I haven't been over to the Sale Forum since the changes were implemented.
The Pop Ups could be coming from another site they are using, like that Ponzi thing or what ever it is called.
The only fer instance thing I can give you is like, when watching a Tv show on Project Free Tv, you may experience Pop Ups, but they are coming from the streaming site that is hosting that particular video and not directly from the Project site.
The best you can do is try Ad Block. It does work 100%, 99% of the time.