I read an interesting article about delivery drivers in NYC, specifically how much of the market was completely unregulated and illegal, and how people work within what functions as an underground economy:
https://www.nytimes.com/2023/09/15/nyregion/migrant-delivery...
The person doing the work often isn't the person registered with (e.g.) DoorDash. There's a whole economy of middlemen who resell straw buyers' credentials/accounts.