I wonder if the cash-by-mail payment option creates some kind of legal liability for Mullvad. If it suddenly became very popular, I would imagine the financial

I wonder if the cash-by-mail payment option creates some kind of legal liability for Mullvad. If it suddenly became very popular, I would imagine the financial authorities would be rather unsatisfied with "oh, we receive a bunch of cash from anonymous customers by mail, nothing dodgy here..."