I have $407.28 Uber Cash in my account, and when you pay via Uber cash, you still have to select a non-Uber Cash payment method. So I selected my Amex. After my $82.79 order, I have $324.49 Uber Cash left. However, on the receipt, it says $15 Amex credit is applied. Anyone else having this issue? Do you have to pay with Amex and not Uber Cash to get the $15 credit? Is the $15 credit a discount via Uber, or a credit card reimbursement transaction?

Before order


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After order