Originally Posted by SkyMuffin
Actually, they don't have to be. Pirated apps still use Gamecenter even without an official purchase.
I can think of two Devs that have really done well on the appstore: Rocketcat and Halfbrick. It is very possible. The main limitation i've noticed is that most games just don't reach the same level of fun and polish that these do. I really don't think it's about "getting lost" in the market...there are just not that many games that stick out above the rest.
Good to know about GC -- thanks.