registering a payment method does just that- registers a payment method....

It's not complicated- you just click that, choose the payment method you want to use and it will be registered to your account. then whenever you incur service fees, they will be billed to that payment method.

Most people should not have the described issue above using a credit card. Just be aware if you DO get an error, not to try again right away. I've never had trouble using credit card payments; but this is the only way to pay automatically. the only way you can automatically pay with crysta is to put more than 1 month's worth of fees in crysta on your account. As long as there's enough crysta to cover your sub, it will be taken automatically without any effort on your part.