Can someone tell me which credit cards does Costco accept? Do they accept cards other than the American Express Costco credit card? What about debit? I know many places don't take credit cards but they do accept Mastercard and Visa debit cards. I was there with my sister and was under the impression they only accept American Express. Can someone tell me if this is true and if it is true how is that legal? I thought there were antitrust laws that prevented a single credit card company from monopolizing the market?
Thanks in advance.
[The Confused Shopper]