He paid for 10 orders and wouldn’t tip unless they came on time . Only one person got tipped $20 by not being late. His secret was since he didn’t tip in app people were less motivated then probably he became a shitblist house making his service worse. After 10 orders he got a pizza party free with points.
It sounds like he was purposely being a jerk so he could screw the drivers out of their tips, and meanwhile Dominoes made way more profit off those 10 orders than it cost them to give him one free pizza.