If I have to pay at all past an initial payment, it means if I don't I'll be a "free" player and I won't get anywhere and I'll be a hobo while the "premium" players are gods who create entire cities and chop my head off every chance they get because I'm a free noob and they want to slit my throat with a spoon.
I'm done with games like this, they're all the same.
Then again, that doesn't mean it doesn't look fun. If anything possesses the developers to stop being so corrupt and making their game completely free, I'll try it.