I went to a takeout place once where they ask you out loud about if you want to add a tip and I said no. It’s the most awkward thing to say out loud. At least when they ask about donating to save animals or whatever the animal isn’t right there staring you down
I could do that, or I could just keep hitting “No tip” when I know they literally did nothing but hand me the thing I ordered across a counter.
For the sake of argument I could boldly reach across the counter, grab my order and walk out. Would that be cheating the clerk out of money? If that interaction is required and it costs money I’d be the one that felt cheated. That’s in the realm of Ticketmaster convenience fees