DefauIt
I can't give any in site as to why it won't let you sign up... Maybe file a help ticket?
But Gaia only runs it's things through paypal... So you will have to use it if paying by card. ^^
I remember a time when it wasn't always that way. I've paid through credit card before. And by having them bill my cell also. But if that's how it is now then I guess I won't be getting gaia cash anymore. Anyways, thanks for the advice n_n