Paying with a gift card works a bit differently than traditional payment methods.
On the next page you will be asked to enter your gift card details at our gift card processor. They will check your card balance and offer you subscription time. You will be free to accept or decline the offer. There is no impact to your gift card if you decline.
Accepting will consume your remaining gift card balance. When the time elapses, you can extend with another gift card or switch to an alternative payment method.