It's not a credit card. It's a debit card issued by Visa. There are clear differences. Also you will not pay fiat-money free using such cards. Because the debit card works as follows: You deposit Bitcoin or another crypto currency on Bitpay. The crypto currencies are then sold directly and the fiat money is credited to your card. You then go shopping with the fiat money. Thus it is only a conversion and no money-less payment as suggested.