I assume that it is the owner of the board that effects this, I am not too tech savy but know that I can not stand being on the parents place board because I get bombarded with pop up ads. I guess they sell that right to compnaies...maybe...
Anyway please if that is the case never do that, my computer actually needs rebooting many times after visiting parentsplace...I just tried to get on it and must have had 10 pop ups come at me and just didn't enjoy my "stay"...
They all also say "lower your bills"...since I am usually drooling over a stroller, car seat or the "new thing" this pop up ruins it for me :)....