As a one time pizza delivery boy, you really live and die on your tips. That's where all your profits come from. When you deliver a $150 order, you're already counting a nice tip. When you get stiffed, you're a little devastated. I'm sure there are at least a few of the big game players that tip really well, and that's what you're hoping for when you deal a big game. Same with pizzas, you're hoping for the big tip and it's disappointing when you don't get it, unless: