Mastercard doesn't give a crap about weed, and aren't trying to control anything. They don't want to be a part of federally illegal transactions. They want to follow the law, because they're a big business and it's dangerous not to. This is simple a result of the fact that weed is federally illegal - any other move on mastercard's part would be irresponsible at this time.
Mastercard is a payment processing company that processes both credit and debit card purchases. They don't actually issue any payment cards themselves, they just want to make sure they aren't processing payments that break federal law.
Two things, first was a typo. I meant 60 years not 50.
Second, my wording should have been 'Credit Cards, as they are, didn't even exist 60 years ago'. You can argue 1958, but there was no successful credit card that even remotely resembles the modern type in 1950. Even then, it wasn't until late 1960s that the type of predatory credit card was generated. In the 1970s they made it far more aggressive.
The first actual credit card was The Diners Club Card in 1950. American Express arrived in 1958. How we use them today was really introduced in the 1990s though.
Take a deep breath mate, no reason to get so worked up. Pretty sure both of you guys mostly agree with each other, just getting caught up in semantics at this point. Give each other a break :)