I am topping up my Paribas card by bucks coming from Bittrex and Bitstamp for almost three years. BPN doesn't care abt the origin of those bucks just like as Mastercard. My card has no extra shells to hide transaction from crypto exchanges while MNX card designed to have plenty of them. All hypotheses pertinent to possible MNX lock either by issuer or Mastercard got my ass laughing. Those trolls namely JollyCunt (aka JollyGood) and thunderfart (aka thunderjet),  made my evening, thank you.