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DoorDash now warns you that your food might get cold if you don’t tip
(www.theverge.com)
This is a most excellent place for technology news and articles.
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.