Because MasterCard and Visa are essentially a global duopoly - they most certainly should not be allowed to discriminate against any legal industry, even if it

Because MasterCard and Visa are essentially a global duopoly - they most certainly should not be allowed to discriminate against any legal industry, even if it is extremely high risk. Because that leads to very serious harm for people who legitimately work in those industries. It should be as hard for MasterCard or Visa to not serve a company as it is for a utility to turn off the water to a home.