Apple Pay and Amex Points

I got a letter from American Express saying that they will not provide 2x rewards on Uber if you use “alternative methods of payment” to process Uber transactions.

So, basically this is the first rift I’ve seen in Apple Pay. Someone at Amex decided that the tiny fee paid to Apple made the Uber alliance have a lower than expected margin, so they made this change. I wonder if other cards will follow suit?