If a merchant gave me a solid 4% discount for handing over a wad of cash, I'd put away the credit card.
If a merchant gave me a solid 4% discount for handing over a wad of cash, I'd put away the credit card.
They don't and can't give you a solid 4% discount for cash payments (or a credit card surcharge) because it is generally against the terms of their merchant agreement and they would be at risk of losing their ability to process credit card transactions altogether.
My original comment was merely reflecting on the fact that the perceived upside of getting rewards is dampened by increased costs that are passed all the way back through to the consumer anyway.
It wouldn't hurt, IMHO, to just ask a vendor if they can give you a discount for cash.
Some groceries near me (given the large Asian/Indian population) simply don't accept CCs. Some accept debit cards, and give you an incentive for cash.