Perhaps this is a way DoorDash is trying to encourage some to reconsider before opting out of tipping the people driving here and there to deliver your order. Or maybe they just want to reward people who offer more compensation to their drivers. Whatever the case, it may be something you want to consider.
Nothing is worse than going out to eat and ending up with a big surprise when you get the final bill. More and more diners are seeing the prices on the menu and assuming that is the price.
That is not always entirely the case. That is where automatic gratuities and service fees come in.