Only the interchange is capped. The merchant has to also cover network and processor fees. And then there are some uncapped transaction supposedly so the fee covers this risk. Comes out to 0.6-0.7% for a smaller merchant with the card present.
replyOne person’s insanity is another person’s interesting puzzle and optimization problem.
replyYou optimize within realm of already paying higher fees, some optimization that is.
replyAlso, some of us have actual lives to live and not obsess over such details, life is way too short and has much more to offer than bean counting accounting.