I read here that lots of Asian gamers use OKCash, and that OK's closest competition is GameCredits. Could anyone comment on how that's the case? I don't know anything about GameCredits, what their function is or what features they offer, but I'm sure we'd all like a bigger piece of their marketplace pie.

How is OKCash or GameCredits used by gamers? Where does OK have the edge? Where does GC have the edge?
I ask because not only am I curious, but would like to spread the word about such comparisons, especially if OKCash has an edge somewhere. (not just in price, of course)