Is it possible they are adding the merchant fee they have negotiated with each Network (Visa, MC, Discover, Amex) to the normal ride fare??? This would also be bad, as no one can notice it and there are states where you can not charge more for using one or another type of card, starting with Debit, prepaid and credit cards differentiation. Just a thought, but I only use CSR on Uber, so looks like I should be getting lower priced trips, LOL.