that's not true.
the delivery and tip is usually about 20-30% of the cost, the same as you'd pay in a sit down restaurant.
when i order from places, my bill is the same pretty much as it would be if I went there and sat down to eat.
i love these replies saying every order is $50 or something... these people have never used a delivery app. vast majority of my orders it's a 5 bucks in fees and a 5 buck tip on a 25 dollar food order. most of my orders are 30-35 dollars.