Tipping Does Not Scale. Tip your indie title or book with like 2 devs. Tip your hobbyist etsy seller. Once you're at the scale of a billion dollar industry, they *do not need it* and *will not use it well.*
Yeah, the forced tipping some fast food chains do isn't great but at least any tips are actually going to the people who made your food. It's not like there aren't a million microtransactions in Blizzard games for people who want to show their appreciation to throw money at them