Mastercard has told financial institutions to stop allowing marijuana transactions on its debit cards, dealing a blow to an industry already on the fringes of the financial system in the United States.
From the article: "The federal government considers cannabis sales illegal, so these purchases are not allowed on our systems," the spokesperson added.
Seems like this isn’t a Mastercard thing, but a government thing. Marijuana is still illegal at the inter-state level unfortunately.
that hasnt been being enforced for a long time, so if something's changed it'd help Mastercard's PR quite a bit to point to a government order or something.