I've been getting a lot of Youtube vids about tipping culture and that's why I brought it up. Also, I have an account on NextDoor and many of the older members are confused about when to tip.
Black people typically do not tip and many people in the service industry do not want to deal with them. A young black man made a video about how he loathed black customers, especially black women. They make ridiculous demands without tipping. They also dine and dash.
If you are too cheap to tip then don't patron these establishments . Even though tipping is not mandatory, it is expected. If you keep going to them and they know that you don't tip, well now you know that you are probably eating their spit. lol As for gig industries, they know the non-tippers. Your order will be extra late because no one is accepting your offer. If you live in a zone with a lot of non-tippers, also expect delays because no one wants to work that area.