Why is an author unable to pay fees by credit card?

Why is an author unable to pay fees by credit card?
At this time we cannot accept credit card payments for these fees because our system is not equipped to process them. The exception would be for online submission. There is an option to pay with a credit card online at the time of submission. If your card is declined you will receive a letter requesting payment by money order or cashier’s check after publishing has begun.Once this process begins we can no longer accept payment for Copyright registration which is why we stress making payment in a form that will not expire.