Bowie Snow runs in the tulips at Strawberry Fields, Lifton, Devon on April 13, 2025. The South West's largest tulip festival takes place across April, showcasing 250,000 Tulips with over 40 varieties across three acres at Strawberry Fields in UK. (Photo by William Dax/South West News Service)

American vedette, burlesque dancer, model, and businesswoman Dita Von Teese performs on the runway during the Alexis Mabille Haute Couture Fall/Winter 2024-2025 show as part of Paris Fashion Week on June 25, 2024 in Paris, France. (Photo by David Fisher/Rex Features/Shutterstock)

Switzerland's Zoe Verge-Depre, right, sets up a shot for Esmee Boebner in a beach volleyball match against Canada at the 2024 Summer Olympics, Wednesday, July 31, 2024, in Paris, France. (Photo by Robert F. Bukat/AP Photoy)

Colombia's Tatiana Renteria Renteria (red) wrestles Japan's Yuka Kagami (blue) in their women's freestyle 76kg wrestling semi-final match at the Champ-de-Mars Arena during the Paris 2024 Olympic Games, in Paris on August 10, 2024. (Photo by Punit Paranjpe/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.

21 year-old Chanel Tapper, with the amazing tongue and 35 year-old Aevin Dugas, with the beautiful hair was certified as world record breakers for the world’s longest tongue and the world’s biggest afro in the Guinness Book of World Records. (Photo by Guinness World Records)

A Snowboarder participates in a waterslide contest, which consists of gliding over a water pool embedded in snow, during the closing event of the ski resort of Nendaz, southwestern Switzerland, Monday, April 21, 2014. (Photo by Maxime Schmid/AP Photo/Keystone)

A protester is taken away by policewomen after storming into the government headquarters in Hong Kong September 27, 2014. (Photo by Bobby Yip/Reuters)