Gas stations in my area often give a 3% discount for paying with cash, vs. credit. Leading me to suspect that they're paying 3%+ to Visa/MC. And that the bene

Gas stations in my area often give a 3% discount for paying with cash, vs. credit. Leading me to suspect that they're paying 3%+ to Visa/MC. And that the benefits of cashless are nowhere near what its proponents claim.