The automated payments are monthly at the end of the billing period by any major credit card.
Alternatively you can also use PayPal, wire transfers, checks or Chase QuickPay - once we receive the money, we will add a credit to your account. When you get billed, the money would be taken from your credit, not the credit card.
To pay with PayPal, just click button Pay in the email you've received or link Pay on My Account page or link Add Credit on My Account page and they select Pay with PayPal option. To pay in any other way - just email us on firstname.lastname@example.org telling how you want to pay and we'll respond with instructions.