Offer your thoughts or opinion on the input financial query or topic using your financial background.

Why are American Express cards are not as popular as Visa or MasterCard?
I have a merchant account and accept Visa, Mastercard, and Discover but not AMEX. I don't take AMEX because they want me to go through another approval process (on top of what was required to get merchant status) and their fees are a percent or two higher than the other cards. This doesn't sound like a lot - but for a business that grosses $1M per year, an extra 2 percentage points is $20K. I don't gross $1M, but the additional cost for me to take AMEX would still use the word "thousand" and I don't see any reason to jump through extra hoops and fill out more forms for the privilege of giving extra money away. I haven't found anyone yet who wanted to pay me with AMEX who can't pay me with another card or a check instead.