If the price of Good N is Value of N+x where x is a markup to cover the costs you’re talking about, that cost is passed on to people who pay with any means. If I buy a TV with cash, or credit card, it costs the same. Except of course that I can get cash back on my card, but not with cash (or bitcoin).
So, credit card or not, the cost is there, even if I pay with bitcoin or ether. Except of course for the benefits of the credit card.