You May Be Able to Have More than 4 Amex Cards!

It’s a YMMV (Your Mileage May Vary, results not guaranteed) situation, but American Express’ rule about no more than 4 credit/charge cards may have some flexibility.

http://frequentmiler.boardingarea.com/2016/03/31/amex-allowing-more-than-4-credit-cards-sometimes/

Credit cards