People watch as Secretary of State Antony Blinken's motorcade moves through Kinshasa, Congo, Tuesday, August 9, 2022. (Photo by Andrew Harnik/Pool via AP Photo)

Revellers enjoy the Notting Hill Carnival for the first time in three years in London, United Kingdom on August 28, 2022. (Photo by Simon Jones/The Sun)

A cow decorated with charms, colorful ropes and beads is seen as the local cattle breeders who prepared sash, loincloth and their local clothes known as “bush vest” before coming to plateau, their animals in Trabzon, Turkiye on September 24, 2023. (Photo by Hakan Burak Altunoz/Anadolu Agency via Getty Images)

Roman Cervenka #10 of Czechia celebrates with the trophy and gets a beer thrown on him from his teammates during IHF Ice Hockey World Championship gold medal celebrations with fans at Old Town Square on May 27, 2024 in Prague, Czech Republic. (Photo by RvS.Media/Monika Majer/Getty Images)

Emily clement, 9, left, and her sister, Mallory, 9, pick strawberries together at the Trunnell's Farm Market strawberry field, Saturday, May 31, 2025, in Owensboro, Ky. (Photo by USA Today)

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.

Actors perform a scene in a film directed by Humam Husari in the rebel-held besieged town of Zamalka, in the Damascus suburbs, Syria September 19, 2016. (Photo by Bassam Khabieh/Reuters)

A lizard is seen hunting for fish during the daytime on May 04, 2017 in West Sumatra, Indonesia. (Photo by Riau Images/Barcroft Images)