[Freakin]

I think another potential problem is that most people who would play WoW already do. So if you launch this site, you should have a longer-term goal of spreading the same model to ALL MMORPGs that may come out in the future, or any other subscription based games. This way you'll already be set up to capitalize on the next big game, cause WoW won't be it forever.

I believe that penny-arcade.com had a deal with Eve-online that was earning them a healthy kickback on new signups.