You can't really say that NX is all bad just because it's not readily available; Nexon does have to make money, but I disagree with their methods.
kMS, IMO, has the best NX system, where you get permanent NX equips, and none of this 2x crap (which I'm in total disagreement with).
The one thing that bothers me about kMS though is that you can sell CS items in a shop, which is worse than even MTS, which requires at least a SMALL amount of work =/