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.

Britain's Catherine, Duchess of Cambridge plays a stroke of golf during a visit to meet young people supported by the Cheesy Waffles Project, a charity for children, young people and adults with additional needs across County Durham, at the Belmont Community Centre, in Durham, north east England on April 27, 2021. (Photo by Andy Commins/Pool via AFP Photo)

American actress and professional kiteboarder Maika Monroe is seen leaving the Saint Laurent show on February 25, 2020 in Paris, France. (Photo by Beretta/Sims/Rex Features/Shutterstock)

English actress Helen Flanagan showed off her boob job in a sultry social snap in the last decade of March 2023. (Photo by Instagram)

Rachel Zegler, right, a cast member in “The Hunger Games: The Ballad of Songbirds & Snakes”, shoots a selfie with fellow cast members Tom Blyth, left, and Hunter Schafer at the Los Angeles premiere of the film, Monday, November 13, 2023, at the TCL Chinese Theatre. (Photo by Chris Pizzello/AP Photo)

Colombian singer Shakira showed off her incredible age-defying figure in a new bikini photoshoot early March 2024. The She Wolf singer, 47, had fans declaring that she was “aging backwards” as she posed in a nude tasseled two-piece on the beach. (Photo by Nicolas Gerardin)

Creations by fashion designer Guo Pei, one of China's leading couture artists, are seen on display during the “Guo Pei: Fashioning Imagination” exhibition at the M+ art museum in Hong Kong on September 17, 2024. (Photo by Peter Parks/AFP Photo)

A man poses as “Lemongrab” from Adventure Time outside the MCM Comic Con at the Excel Centre in East London, October 25, 2014. (Photo by Andrew Winning/Reuters)