[forgotmylogin2]

So what? Then the restaurant doesn't have to pay a fee.

If the problem is that the delivery services are charging high fees to restaurants, then terminating the relationship with the delivery service solves that problem. If the delivery service wants to make orders like a normal customer without any discounts, that's good for the restaurants.

[ryanwaggoner]

No, because by doing so, the delivery services are effectively injecting themselves into the middle of the relationship between the customer and the restaurant. Over time, most customers will launch the app when they're hungry in general or for a type of food, and if they don't see a specific restaurant there anymore but they do see competitors that have decent ratings, they'll just order from them.

[forgotmylogin2]

That's a lot of businesses. The local liquor store "injects themselves" between you and Budweiser when they sell you beer. It's not inherently evil or unethical to act as a middleman, especially when you provide additional value that the original business does not.

[m-ee]

Restaurants don't always have the capacity to make delivery orders and may not want to deal with the logistics of impatient drivers coming in and demanding their food in the middle of a dinner rush. In some cases they've set up fake websites and taken orders for restaurants that don't even offer takeout.

Whatever their reasons for not wanting the business the OP's point was 'they can always opt out' which just isn't true.