delivery websites also mark up the prices for food and drink too. If a person orders food to be delivered directly off the restaurant's website, then most restaurants will charge a delivery fee too. I have not been able to figure out yet if that fee is to cover the customer's usage of the service, the restaurant's usage of the service (assuming the restaurant doesn't have its own delivery employees), or both.

It does appear that in some cases (i.e. pizza, Chinese) the fee on the restaurant's website is the same as the fee on Grubhub or DoorDash. In those cases the pizzerias or Chinese restaurants uses their own delivery employees, so it isn't clear what cost (if any) that fee is covering on the delivery order. If you order food via Grubhub and DoorDash and the restaurant (i.e. Papa John's) has its own delivery employees, then I believe 1 of those employees will deliver the food instead of a Grubhub or DoorDash employee. In that case, I'm not sure if Grubhub would keep the delivery fee as profit, use it to reduce Papa John's monthly fee, or transfer it to Papa John's.