There is no customer involved.

1. They place an order and pay for it
2. They force the order to be assigned to one of the drivers
3. Driver claims the order is delivered
4. Doordash pays the driver
5. They overwrite the data so that it goes back to step by 2.
6. They “deliver” and get paid for the same order hundreds of times.

Books were probably red, but it takes a while to identify something like this.