If you want to learn more about this space, I'd check out Payment Systems in the U.S. [1] which talks about a lot of the history and parties at play here. It's

If you want to learn more about this space, I'd check out Payment Systems in the U.S. [1] which talks about a lot of the history and parties at play here. It's also fun/interesting to look at the published interchange rates for various classes of commerce. Here's Mastercard's: https://www.mastercard.us/content/dam/public/mastercardcom/na/us/en/documents/merchant-rates-2021-2022-apr-2021.pdf https://www.mastercard.us/content/dam/public/mastercardcom/n... [1] https://www.amazon.com/Payments-Systems-U-S-Third-Professional/dp/0982789742 https://www.amazon.com/Payments-Systems-U-S-Third-Profession...