confused-shopper wrote: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?
Card acceptance at a particular retailer and monopolizing the market are two entirely different things. Costco is not "the market" or else it would be a monopoly itself.
Troublemaker wrote:That's not true in the Costco's I have shopped in.
Read the OP again. While they accept other forms of payment, AmEx credit cards are the only accepted credit cards.