OK, one thing you guys need to know, is that the card networks never issue cards by themselves. They always partner with a bank or a financial service to do so. In this case, Mastercard is working with Mercury, a financial services provider for small businesses. Though really it would be more accurate to say that Mercury is working with MasterCard, since the fintechs and banks have to reach out to the card networks first to request a card partnership. The networks are not interested in going around and asking the fintechs themselves.