So what happened when credit cards went toe-to-toe with bitcoin? Bitcoin got its ass handed to it. http://pando.com/2013/08/27/an-expensive-lesson-against-sell... Ebay had to ban bitcoin sales because sellers were getting ripped off so often by credit card owners.
How so? The whole scam was predicated on abusing the chargeback feature of credit cards. This just proves that credit cards are terrible at cash-like transactions (buying cash/gold/bitcoins/gambling).