That doesnt happen much, theres high competition and theres a race to the bottom to lower the price. For delivery most orders come through grubhub/seamless so a restaurant has the option to make no deliveries or cave in to ubers cut and price the food competitiely on the platform. Lots of small restaurants will probably go belly up. Grubhub sucks the market from under their feet and all the profit from their pocket. It doesnt help that people want free delivery too and the prices low.