Our office runs just fine on Amex. You might need a Visa if you're charging coffee in the morning to your business. Otherwise, this doesn't ring true to me.
Note that I get why you'd carry Visa/MC debit in your personal life. I just don't know why you'd work with the banks for your credit card.
How about restaurants, small retailers? I dunno. I guess it depends on where you are. If Amex is a stand alone card for you, pretend it isn't. I was just illustrating a point.
Note that I get why you'd carry Visa/MC debit in your personal life. I just don't know why you'd work with the banks for your credit card.