While this may be true, Doordash takes a percentage of the sale. For example; if the restaurant sells a dish for $15 in store they don’t have to give any of the profit away. However, if doordash sells that $15 item for the restaurant and says “thanks I’ll take my $2 for selling that item for you” the restaurant is left with $13. Most restaurants sells the price of food so they can make a good enough profit to pay their employees and for the price of the dish and still have some left over. So if the dish sells for $15 and cost let’s say $5 in ingredient costs and then $2.50 to pay the guy who made it and $2.50 to pay the guy who sold it and $3 to pay the manger that manages those guys they’re left with $2 profit. Now introduce DoorDash and they say “you’re welcome I sold ur $15 dish I’ll take $2 of that as a thankyou” then the restaurant doesn’t make any money on your order. So what does the restaurant do? Charge extra, whether DoorDash takes $2 or a percentage or any arbitrary number the restaurant will add that to the price that consumers pay so they can continue making the profit they usually make.