It varies by individual vendor, the fear of some vendors is, that because banking is federally controlled, the Feds could sieze the funds, as technically marijuana is illegal under federal law, though I have not heard of that happening. In CA, they were floating the idea of creating a State banking system for dispensaries and such to bypass the Feds. Of course the other reason could be that the Credit Card companies charge some fairly hefty fees (%) on each transaction. Plus they charge you just to have the ability to take credit cards.If you’re in the U.S. they should’ve taken your card. Wonder why not? CL