To use your Uber credit on your Amex Platinum, download the Uber app, create an Uber account, and add your Amex Platinum as a payment method. Enroll in this benefit then you’ll automatically receive $15 in Uber Cash each month, and a $20 bonus in December, on your account. That’s a total of $200 in Uber Cash that can be used on Uber rides or UberEats orders. Terms apply.