In small restaurants, that’s just a tax grift for the owner. The “smarter” ones underreport income, the dumb ones steal the sales tax and the hammer eventually drops. Over time, they’re probably paying a lot more than 3% for shrink, Due to screw ups and employees skimming the till.

Credit cards have a really high ROI. The 3% drives 10-20% more spend, sometimes even more. When I was on the board of a small private school, we bought a square terminal and used QRs for flyers. That drove 30% increases in fundraiser expenses and helped us reduce mailings and nags. We would cross-sell stuff - could buy your youth soccer registration at the fall fest or whatever.

The things where ach, check, cash make sense are where there’s no discretionary spend at point of sale or recurring payments. If you pay 75 bucks a week that have your apartment cleaned dog groomed or whatever. You’re not getting value beyond taking the payment in advance with a credit card. Those are the areas where Venmo and Cash app have really dominated.