Everything else being equal, given the choice between a restaurant that makes me calculate a tip and one that just puts a single price on the menu with no tip required or expected, I’m going for the simpler option. One less thing I have to worry about.

Besides, I honestly would be sort of annoyed that you insist on making your dissatisfaction with your credit card processor my problem as a customer. I have my own problems to worry about, don’t make my saving 1-4% on groceries vs. 2-3% cash back on my credit card another thing I have to deal with. I’ve stopped shopping at certain grocery stores over less.