You put your finger on it. You can tip 100% and someone else with limited mulah can't. That's what makes it special and impossible to find such WHs in SF, LA, NYC areas.

My cheese eggs with raisin toast, bacon, and grits, hold the apple butter, is only about seven dollars. I don’t make a lot of money, so it makes me very happy that I can leave a seven dollar tip and pay about the same as I would have if I had gone to another place.