[Retrofitted]

Nope. They're making their biggest money on fees to both customers AND restaurants. From their own website: "How much does Grubhub charge restaurants? For orders you receive through the Grubhub app or on Grubhub.com, you pay Grubhub a marketing commission to cover the cost of listing and promoting your restaurant. This ranges from 5% to 20% of each order, depending on the Grubhub pricing package you choose."

I remember when we were under lockdown and a lot of smaller businesses were trying to stay in business by using Grubhub and the like, but ultimately lost even more money because of the fees.

[oldvirginian]

A pizza chain, Papa John’s I think, did some commercials where they were handing out dollars off coupons for local, Mom and Pop eateries because of the money those places were losing to the delivery services.
A chain can manage those fees, a Mom and Pop not so much.

[Jane Long]

Check out how much info typical apps gather about users.

Selling of that info is BIG biz.

YOU are the product.

Take care.