Silver Medalists Thomas Daley and Noah Williams of Team Great Britain celebrate as they pose following the Diving medal ceremony after the Men’s Synchronised 10m Platform Final on day three of the Olympic Games Paris 2024 at Aquatics Centre on July 29, 2024 in Paris, France. (Photo by Marc Aspland/The Times)

France's Alexia Richard looks up after falling in. loss to Spain in a beach volleyball match at the 2024 Summer Olympics, Wednesday, July 31, 2024, in Paris, France. (Photo by Robert F. Bukaty/AP Photo)

The American singer Jessie Murph shows off her footwear at Variety magazine event in Los Angeles, California on August 8, 2024. (Photo by Jordan Strauss/Invision/AP Photo)

A mountain hare shakes off rain from its fur, in Findhorn Valley, Moray, Scotland in the second decade of August 2024. In summer, the hare’s coat is a grey-brown colour with a tinge of blue, making them hard to spot against the heather moorland. In winter, it changes to almost completely white for camouflage in the snow. (Photo by Will Hall/Solent News)

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)

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 toddler held by her father swims underwater during a swimming class for babies at Lane Cove pool February 16, 2007 in Sydney, Australia. (Photo by Ian Waldie/Getty Images)

Russia's Maria Stavitskaia performs during the ladies short program at the Rostelecom Cup ISU Grand Prix of Figure Skating in Moscow November 14, 2014. (Photo by Grigory Dukor/Reuters)