I push all our spending through a 2% cash back capitalone business visa. Can't find a better cashback rate, though you could run multiple cards through different vendors with their own credit cards, but you get diminishing returns. If you are a big amazon spender (products, not AWS), it makes sense to do an amazon visa, and then the capital one for everything else.

It's really easy to believe the deal when you look at your interchange rates. The Capital One that I mention above has 2.3% interchange rate, so the merchants who take it get hit much harder than other cards. Capital One, stripe, amex etc are all still making a killing on these cards, they just do it on the backs of the merchants who accept them.

Based off our business spending on our card, which isn't extreme by any measures (18 employees, bootstrapped and cash flow positive, doing fairly decent), it probably beats that stripe card even with the processing fee bump.