Probably because dealing with MC/Visa directly is a PITA, and that is likely on purpose even though they have a stranglehold on non-cash in-store payment proces

Probably because dealing with MC/Visa directly is a PITA, and that is likely on purpose even though they have a stranglehold on non-cash in-store payment processing worldwide. Every payment processor went through some version of this: https://kindgeek.com/blog/post/what-is-a-payment-processor-and-how-to-become-one https://kindgeek.com/blog/post/what-is-a-payment-processor-a... The convenience fee of not having to deal with that as a business owner seems worth it to me.