Sejie, if all you want is 500 G, you can earn that pretty fast. Try some jigsaws or fishing -- or just keep posting in the forum. Anyway, this isn't the proper place to make such a request.
I object. I thoroughly object to this person's statement. I object to your suggestion that since many people play MapleStory (including you), then everyone who wants to play an MMO is playing MapleStory. I don't, and you know why? Because I don't want to clog up the computer with the downloaded program. There is one MMO that I play (DragonFable) and I enjoy it very much, but just because I play it does not mean I won't enjoy playing other games.
Also, I am a little confused by the general content of your post. You started by saying that Gaia doesn't need an MMO because it's special, and having an MMO wouldn't be special, which would apparently downgrade it somehow. Then you implied that since Gaia's graphics look "just like MapleStory", if it had an MMO it would provide too much competition for said game. So what I am wondering is this: are you afraid that Gaia Online will take attention away from MapleStory, or that everyone will go to MapleStory and ignore Gaia Online? You don't have to worry about the latter. MMO-ing aside, Gaia Online will still have many features that make it unique; it will still be popular for those features after the MMO is released. So I don't think there's a problem in that regard.