They explained it to me because I left a tip when I went there for take out. They told me I didn't need to tip since the fee covered that (as well as other things that I can't recall off the top of my head) and offered to take it off. So maybe I'm biased since they pointed this out to me instead of being shady about it. Plus, the folks who work there seem like a good group of people.

I do, however, agree that 20% tipping for take-out is unsustainable in the long run. It was fine during the "take-out only" days, but things have gone back to the illusion of normalcy and folks are dining in again.