> Whose responsibility is it to make those cards more common, if not Mastercard's? The issuers. Of course, Mastercard has some influence over them... But they

> Whose responsibility is it to make those cards more common, if not Mastercard's? The issuers. Of course, Mastercard has some influence over them... But they certainly can't unilaterally dictate conditions to them beyond whatever contract they signed. There's also the fact that, even if issuers handed them out, the machines and merchant processors also have to support them. Which was something that still hasn't completely happened in the US, even with the networks pushing as hard as they could. (Moving fraud liability to the merchants is about the biggest move they could make.)