A passenger inter-island ferry Shuttle RoRo 5 is pictured after it was swept ashore at the height of Typhoon Nock-Ten in Mabini, Batangas in the Philippines December 26, 2016. (Photo by Erik De Castro/Reuters)

Michael Cimino, Amanda Diaz and Xochitl Gomez attend the world premiere of “The Flash”, in Hollywood, Los Angeles, California, U.S., June 12, 2023. (Photo by Mike Blake/Reuters)

A child poses for a photo inside a life-sized doll box after watching the “Barbie” film at the SM North Edsa in Quezon City on July 19, 2023. (Photo by Jam Sta Rosa/AFP Photo)

A woman checks on two of her puppies after her neighborhood was evacuated because of severe flooding in Channelview, Texas, on Saturday, May 4, 2024. Days of rain caused rivers to swell, leaving homes and businesses flooded and thousands of people displaced. (Photo by Raquel Natalicchio/Houston Chronicle/AP Photo)

People dressed as pandas walk in front of cheerleaders during the London's New Year's Day Parade event in London, Britain on January 1, 2024. (Photo by Hollie Adams/Reuters)

A boy plays in water from a broken fire hydrant in Rosemead, California on Saturday, May 10, 2025, seeking relief as spring heat breaks temperature records across the Southland. (Photo by Ringo Chiu/ZUMA Press Wire/Rex Features/Shutterstock)

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.

An alligator named Muja is seen in its enclosure in Belgrade's Zoo, Serbia, August 14, 2018. Muja is officially the oldest American alligator in the world living in captivity. He was brought to Belgrade from Germany in 1937, a year after the opening of the Zoo. Muja survived three bombings of Belgrade, the Second World War and all hardships the Zoo went through. (Photo by Marko Djurica/Reuters)