Yes, that is absolutely an option. Your credit will remain on your account through the lifetime of your subscription, so long as you have available credit that

Yes, that is absolutely an option. Your credit will remain on your account through the lifetime of your subscription, so long as you have available credit that can be applied towards a subscription. We will always draw from available credit first. So if you apply a giftcard to your account and later add a payment method, we would charge the difference between the remaining balance on the gift card and the standard price to the payment method.