Rosanna Davison attends the “Lambertz Monday Night” at Alter Wartesaal on February 1, 2012 in Cologne, Germany. (Photo by Andreas Rentz/Getty Images)

A robot takes part in what is billed as the world's first robot half marathon during the Humanoid Robot Half-Marathon held in Beijing on Saturday, April 19, 2025. (Photo by Ng Han Guan/AP Photo)

Italian singer Benjamin Mascolo and American actress and model Bella Thorne attends the Milano Pride Event in Sempione Square on June 26, 2021 in Milan, Italy. (Photo by Mairo Cinquetti/NurPhoto/Rex Features/Shutterstock)

Finland's Heta Tuuri competes in the women's high jump qualification during the World Athletics Championships at the National Athletics Centre in Budapest on August 25, 2023. (Photo by Ben Stansall/AFP Photo)

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.

American actress Sydney Sweeney arrives at the premiere of “Immaculate”, Friday, March 15, 2024, in Los Angeles. (Photo by Jordan Strauss/Invision/AP Photo)

A person performs during the 2022 NYC Pride parade, in New York City, New York , U.S., June 26, 2022. (Photo by Brendan McDermid/Reuters)

Actress Demi Moore attends Irving “Swifty” Lazar's Oscar Party hosted at Spago on March 29, 1989 in West Hollywood, California. (Photo by Jim Smeal/WireImage)