i believe that they used to rent out banner space...
i remember seeing a thread about it actually looking for people to invest in space...but i cant seem to find it...up there with the "so2007 DVD" and "hardcoreweather.com" banners i would see at the top of my screen...
but now all i see is google ads...i think you should PM tim vasquez, hes the owner of this forum...and if anyone can answer that question, it would be tim...