However, in truth they pay damage in reputation. If the delivery company delivers food slow, or lets it get cold, then the customer will blame the restaurant. On top of that, unpartnered restaurants will naturally get slower delivery times because the order flow involves grubhub delivery people walking in and placing an order (or calling in), whereas partnered restaurants get point of sale systems integrated with grubhub's backend. They get less accurate delivery time estimations. They might pay a much higher delivery fee or service fee. All things add up to a worse customer experience.
[a]: I.E. non-Prime purchases (ignoring the fact that Prime purchases can also just be late)
Some background reading: https://themargins.substack.com/p/doordash-and-pizza-arbitra...
Be sure to also read this insightful comment left by a former GrubHub employee: https://themargins.substack.com/p/doordash-and-pizza-arbitra...
That's why this is fraud.