Annabelle, 13, and her sister Estelle, 10, both artistic gymnasts from Borna, hang from the rings during their training, ahead of the Special Olympics World Games Berlin 2023, the world's largest sports movement for people with intellectual disabilities, at the Federal base for competitive gymnastic artistics in Chemnitz, Germany on May 6, 2023. (Photo by Annegret Hilse/Reuters)

English television presenter Maya Jama attends The Fashion Awards 2022 at the Royal Albert Hall on December 05, 2022 in London, England. (Photo by Backgrid UK)

Free for Editorial Use Ballerinas from The Royal Ballet School perform on December 2, 2025 under Covent Garden's first festive snowfall to launch the destination's daily December snow flurries. (Photo by Paul Grover/Covent Garden)

“In honor of Friday’s World Press Freedom Day, the non-governmental organization Reporters sans frontières (Reporters Without Borders) launched a campaign depicting world-famous dictators giving everyone the finger, or the international equivalent thereof”. – Kay Steiger. (Photo by Vincent Bousserez/Reporters Without Borders)

In this handout provided by the National Aeronautics and Space Administration (NASA), SpaceX's Falcon 9 is moved to the launch pad prior to the rocket's Thales Alenia Space launch attempt on April 26, 2015 in Cape Canaveral, Florida. (Photo by NASA via Getty Images)

Villagers gather long grass in the Mekong Delta, Vietnam in the first decade of February 2024. The grasses are used as an alternative for plastic products such as baskets. (Photo by Natnattcha Chaturapitamorn/Solent 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.