lol, rank is based off play, not qi.
also: money makes this world go round, Nabi can't continue updates if they go broke, so honestly if someone's going to buy it, I say release it to be bought! the more money Nabi has, the more effort they'll be willing to put into the game. Plus, it's just a game, who cares if someone buys their way to black-belt? does it effect you? no. Does it effect the gameplay? probably only for the person who bought their way up.
I don't really see the reasoning behind all this complaining, it's a simple matter of needing money, and getting it.