Good to hear! Bring this to Europe and I can see it being very popular, credit cards aren't as common or easy to get here and ordering outside of your local country often requires one. I imagine that's still a long way away though :).
Credit cards are hard to get in Europe? If you are talking about cards with credit line, sure, but debit/prepaid cards are pretty easy to get (e.g. Number26, Monese, Revolut, Fidor etc).