When talking about gambling, whether it's sports betting, robinhood, etc. I have no doubts it is addiction. The article suggests this, too.

I don't personally know anyone who uses doordash regularly, but I've seen a handful of commenters on hn complaining about doordash while pretending there's no possible other way to get their food (even after getting possible alternatives). Just wait for doordash to come up in the news again and see if you can't ask someone anonymously about it here :)