Presumably you can pay visa's customers with cash as well as using Visa and perhaps Mastercard? Possibly even Discover or even Diner's Club (is that still a th

Presumably you can pay visa's customers with cash as well as using Visa and perhaps Mastercard? Possibly even Discover or even Diner's Club (is that still a thing?) I am not sure the analogy holds up. I am assuming merchants are the customers here. You can offer "rewards points" or other mechanisms of remuneration to Visa card holders.