This aerial image shows autumn leaves at their peak as they surround Tsutenkyo Bridge amongst the grounds of Tofukuji Temple, in the city of Kyoto on November 27, 2024. (Photo by JIJI Press/AFP Photo)

Raquel Poti poses for photographers during the “Amigos da Onça” street party on the second day of Carnival on February 10, 2024 in Rio de Janeiro, Brazil. (Photo by Buda Mendes/Getty Images)

Austyn Scruggs, Alex Sutton and Josh Taylor, all sailors from NAS Jacksonville make their way down the 18th hole fairway in their St. Patrick's Day dragon costumes during the fourth and final round of The Players Championship PGA golf tournament at TPC Sawgrass in Ponte Vedra Beach, Fla. on March 17, 2024. (Phoot by Bob Self/Florida Times-Union via USA TODAY Network)

MotoGP Ducati Lenovo Team rider Marc Marquez (R) of Spain and his girlfriend Gemma Pinto (L) celebrate his World Champion 2025 title after the race at the Motorcycling Grand Prix of Japan in Motegi, Tochigi Prefecture, northeastern Japan, 28 September 2025. (Photo by Franck Robichon/EPA)

Mongolian herder, Khurelsukh, throws the carcass of a goat onto a heap as he struggles to deal with losing a quarter of his herd, on March 8, 2010 in Bayantsogt, Tuv province, Mongolia. (Photo by Paula Bronstein /Getty Images)

Artist Kong Ning wears a wedding dress made from respirators to highlight concerns about air quality and pollution in Beijing, China on December 1, 2015. (Photo by Luo Xiaoguang/Xinhua Press/Corbis)

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.

Men dressed as soldiers pose with models before the opening of the Gamescom 2013 fair in Cologne,Germany, on August 23, 2013. The Gamescom convention is Europe's largest video games trade fair. (Photo by Ina Fassbender/Reuters)