Giant panda Xiao Qi Ji plays at his enclosure at the Smithsonian National Zoo in Washington, Thursday, September 28, 2023. (Photo by Jose Luis Magana/AP Photo)

A view of the start of the 37th Gotland Grand National motocross race in Visby, Sweden on October 24, 2020. (Photo by Soren Andersson/TT News Agency via Reuters)

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.

Women dressed as a rabbit and a fox, who pose for pictures with tourists, walk in central Kiev, Ukraine April 4, 2018. (Photo by Gleb Garanich/Reuters)

Donovan Mitchell #45 of the Cleveland Cavaliers dunks the ball against the Brooklyn Nets during the second quarter at Barclays Center on December 16, 2024 in the Brooklyn borough of New York City. (Photo by Luke Hales/Getty Images)

Daniel Sanders competes during the fourth stage of the Abu Dhabi Desert Challenge — a cross-country motorcycle rally — in Al Quaa, United Arab Emirates on February 26, 2025. (Photo by Red Bull Media/ZUMA Press Wire/Rex Features/Shutterstock)

Camera trapper Xavier Hubert-Brierre put this large mirror on the side of a road through the jungle in Gabon and left a camera there to record how the animals would respond to their own reflections. A silverback gorilla thought it was seeing another silverback and responded by trying to scare off the potential challenger… (Photo by Xavier Hubert-Brierre/Johns Hopkins University Press)

A student gets off a police vehicle which carried her to a high school to arrive in time for a college entrance exam in Seoul, South Korea, Thursday, November 18, 2021. About 510,000 high school seniors and graduates across the country are expected to take the College Scholastic Ability Test. (Photo by Ahn Young-joon/AP Photo)