Paypal gateway (rise price whatever)
OMG paypal? I would like to use your service, but there is no way I will put my card on site to custom popup You can get hacked and I would deal with that not you. Be nice and integrate payment gateway with redirection to bank/paypal.
it will take a while to add paypal to the UI;
However, If you want to pay via paypal, email firstname.lastname@example.org. you can add prepaid credits this way right now.