I was once stationed at Dyess AFB, and I met my girlfriend and future wife while there. At the end of the war my best friend, and roommate came back from Turkey, and since so many troops were returning the base threw a giant party. Beer trucks with endless kegs, civilians allowed to walk about the place, and Domino’s Pizza was there serving everyone. They threw the boxes out, but my wife as a hungry college student was quite familiar with Domino’s policy at the time of collecting dots (the flap on the front of the box), because 5 dots meant a free pizza.
So our take on rummaging around that day was around 80 dots. Rather than be obvious and tip off Domino’s we usually bought a pie, and used the dots to get a second one free.