To improve prompt service, not to stop bitches from stealing your food when you're too depressed to cook. Furthermore, 10% can do way too much or way too little depending on what the fuck was ordered. I manually enter tips. Clearly you've never ordered a full meal for 6 people from one of these services. Tips should be based on distance and time for the order. I just think it's highly ridiculous to pay the delivery driver who did 20 minutes of work more than the cook makes in an hour.