DoorDash now warns you that your food might get cold if you don’t tip::The app-based delivery service is alerting customers that drivers may not take their order in a timely manner if there is no tip included upfront.
I always heard tips started as "To Insure Prompt Service" or something. Which is basically what you're doing here with Door dash, so we've gone back to the root of tips.
Nah, that's a Backronym (added to fit the name after the fact.) Tip comes from English slang, meaning "to give". You can give tips for money or information.