This sounds like the whole idea is just broken. No one is making any money, including DoorDash (I at least assume they're not profitable), and the only money to be made in any of this is the idea of a "tip" which effectively holds your order hostage unless you pay up some unspecified amount. All so you can have a lukewarm burger delivered to your door. Oh, and if you get ghosted, you could have already eaten your hot food by the time you get it sorted, had you just gone and picked it up yourself.

I dunno, does this sound like something a rational person would participate in? ("...he asked rhetorically.")