Hello...
Well, this isn't really a game feature idea, but a feature to the application itself.
I still am suspicious of this game (my [old] anti-virus thinks it's a keylogger), and the last thing I'd do with it is put in a credit card number. Especially since it's doesn't give you any extra info in the game itself. I still want to be able to play online (it SHOULD be free) though, and Paypal payment would allow me to pay for it.
I don't get how anyone could oppose (except for HTC staff (extra payments)) this, but go ahead and say what you like.
~Guymed-