American socialite Kylie and American model Kendall Jenner in the last decade of October 2023 joined forces as Sugar and Spice from Batman Forever. (Photo by Greg Swales)

British-American fashion model and designer Georgia May Jagger put on a busty display as she barely covered her boobs for a for CR Fashion Book in the second decade of March 2024. (Photo by Matt Jones for CR Fashion Book)

Waves to the height of 10m reaching 20-30m at the point of impact smashed against the coastline of the idyllic coastal city of Saint Malo, France on April 10, 2024. The extreme tidal waves were the result of Storm Pierrick. (Photo by Mathieu Rivrin/Solent News & Photo Agency)

Emma White, of Team Cyclocrossworld, hits the dirt hard during the USA Cycling Cyclo-cross National Championship Elite Women's race at the Valmont Bike Park in Boulder, Colorado, on January 12, 2014. (Photo by Jeremy Papasso/The Daily Camera)

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.

A black bear cub performs for its mum at the Pocosin Lakes National Wildlife park in North Carolina, US in January 2022. (Photo by Jennifer Hadley/Animal News Agency)

A Sumatran Tiger looks at visiting children from it's enclosure during the ZSL London Zoo's annual stocktake of animals on January 5, 2015 in London, England. The zoo's annual stocktake requires keepers to check on the numbers of every one of the 800 different animal species, including every invertebrate, bird, fish, mammal, reptile, and amphibian. (Photo by Dan Kitwood/Getty Images)

A person takes part in the annual LGBTQ+ Pride parade in Phuket, Thailand on June 4, 2023. (Photo by Jorge Silva/Reuters)