People gather outside Red Square and the Kremlin for the New Year celebrations in downtown Moscow late on December 31, 2023. (Photo by Tatyana Makeyeva/AFP Photo)

A man poses as his acquaintance takes pictures on a street in the town of Vyborg, Russia on January 28, 2024. (Photo by Anton Vaganov/Reuters)

A woman adjusts the mirror of a retro tram KTM-1 (1948-1950) during the street exhibition “Retro Tram Parade” as part of marking the 125th anniversary of the city tramway service in Moscow, Russia on 13 July 2024. (Photo by Yuri Kochetkov/EPA/EFE)

Lewis McKay, two, from East Kilbride, tries out the drums at the 2024 World Pipe Band Championships in Glasgow. on August 16, 2024 Some 204 bands, representing 13 nations and including 9,000 musicians, are competing over two days. (Photo by Wattie Cheung/The Times)

Models are seen backstage prior to the Walter Van Beirendonck Menswear Spring/Summer 2024 show as part of Paris Fashion Week on June 21, 2023 in Paris, France. (Photo by Francois Durand/Getty Images)

Several beaches along South Florida's Atlantic coast line were closed after thousands of sharks were seen migrating in the waters. The sharks were migrating from Boca Raton to Jupiter since the beginning of March, marine biologists told NBC Miami. Photo: A spinner shark swims just offshore on Midtown Beach in Palm Beach on Tuesday. (Photo by Jeffrey Langlois/Palm Beach Daily News)

Armed Syrian Turkmen villagers are seen near the northern Syrian village of Yamadi, near the Turkish-Syrian border, Syria, November 24, 2015. Turkey shot down a Russian warplane near the Syrian border on Tuesday saying it had repeatedly violated its air space, one of the most serious publicly acknowledged clashes between a NATO member country and Russia for half a century. (Photo by Reuters/Stringer)

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.