I've always used my Amex because it was earning 2x MR on Uber transactions, but that ended. My Costco card is 3% on 'travel and restaurants', does anyone know how Uber & UberEats are coded by Citibank? If it's going to be 'general spending' I would keep using my Amex, but if it's a bonus category I'll swap. I could always try, it won't hurt, but I'm curious.