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.
The apps default to "leave at door" and most people don't expect a knock since they are the ones who ordered and have an app that will notify them food was delivered (if they weren't following along every step of the way like most people do)... Has nothing to do with being "scared".
I used DD a lot during the course of the pandemic and I’d say it was completely botched at least 70% of the time. Part of the reason I used it so much was that they were giving me a ton of money to use in credit due as a resolution to the constant issues. This actually made it very cheap overall so it was hard to complain. I always gave above average tips too