Artist Lindsey Stirling performs at halftime of a NFL game between the Miami Dolphins and Green Bay Packers at Lambeau Field on November 28, 2024 in Green Bay, Wisconsin. (Photo by Patrick McDermott/Getty Images)

English-Albanian singer and songwriter Dua Lipa performs onstage during the 66th GRAMMY Awards on February 04, 2024 in Los Angeles, California. (Photo by John Shearer/Getty Images for The Recording Academy)

Emily Whiteford, 18, of Maryland, stretches before her audition for the Radio City Rockettes at Radio City Music Hall, Wednesday, April 3, 2024 in New York. (Photo by Brittainy Newman/AP Photo)

A woman sits in lotus prayer pose during the “Yoga at the Sunrise” event on Copacabana beach, in Rio de Janeiro, Saturday, June 22, 2024. The activity celebrates International Yoga Day proclaimed by the United Nations as June 21. (Photo by Bruna Prado/AP Photo)

Tony the ten-year-old tawny owl tucks himself on December 8, 2025 into a Christmas tree at the Scottish Owl Centre, West Lothian, where he was hatched and raised. (Photo by Katielee Arrowsmith/South West News Service)

Armed Syrian Turkmen villagers are seen near the northern Syrian village of Yamadi, near the Turkish-Syrian border, Syria, November 24, 2015. Turkey shot down a Russian warplane near the Syrian border on Tuesday saying it had repeatedly violated its air space, one of the most serious publicly acknowledged clashes between a NATO member country and Russia for half a century. (Photo by Reuters/Stringer)

Several beaches along South Florida's Atlantic coast line were closed after thousands of sharks were seen migrating in the waters. The sharks were migrating from Boca Raton to Jupiter since the beginning of March, marine biologists told NBC Miami. Photo: A spinner shark swims just offshore on Midtown Beach in Palm Beach on Tuesday. (Photo by Jeffrey Langlois/Palm Beach Daily News)

Everyone wants to get something for nothing - whether it's a lucky upgrade that means you can turn left when you get on a plane instead or heading off into the economy seats, or even getting a few extra features thrown in for free when you buy a new car.

As some of the sharpest businesses around, no-one understands this quite as well as casinos and that's why they all have a system that they call comps. It's short for "complimentary offers" and these are special treats specially designed to reward you for your loyalty to the casino in question. They're basically bonuses.