Originally Posted by GUWonder

With the use of things like ApplePay/SamsungPay/GooglePlay and lots of online payment facilities, isn't it easy enough to switch between Amex cards for charges (to maximize return/benefits of card use) without physically carrying all the cards? Or does the use of those kind of phone pay tools invalidate some of the benefits that the card user gets from using a given Amex card account?

If Amex were to sort of do what you want, I would expect that they would hike the fees of all the cards even more than it needs for revenue growth management -- as there is also the concern of income/earnings growth management and the risk involved with being in the kind of position that Chase found itself in with the CSR being more expensive initially than it may have expected.