Sparkler fireworks are created by Palestinian children in the al-Zaytoun district on the east of Gaza City on March 28, 2023 during Ramadan. The fireworks, which are made with steel wire wool, are part of the celebrations in the Palestinian enclave during the Muslim holy month. (Photo by Ahmad Hasaballah/IMAGESLIVE via ZUMA Press Wire/Rex Features/Shutterstock)

A person believed to be possessed with the Gede spirit holds sculls during a ceremony honoring the Haitian Vodou spirit of Baron Samedi and Gede at the National Cemetery in Port-au-Prince, Haiti, Monday, November 1, 2021. (Photo by Matias Delacroix/AP Photo)

An Afghan hawker selling balloons walks along a path in a ground in Chaman-e-Hozori area in Kabul on December 10, 2021. (Photo by Ahmad Sahel Arman/AFP Photo)

American rapper Ashnikko poses as she arrives for the Brit Awards at the O2 Arena in London, Britain on February 11, 2023. (Photo by Maja Smiejkowska/Reuters)

Stardust and Bruno Tonioli at “Britain's Got Talent” TV Show, Series 17, Semi-Final 1, Episode 9 in London, UK on May 27, 2024. (Photo by Dymond/Thames/Rex Features/Shutterstock)

Flying pigeons pass over Nepalese street vendors near the earthquake damaged UNESCO World Heritage Site, Durbar Square in Kathmandu on May 20, 2015. Nearly 8,500 people have now been confirmed dead in the disaster, which destroyed more than half a million homes and left huge numbers of people without shelter with just weeks to go until the monsoon rains. (Photo by Ishara S. Kodikara/AFP Photo)

Following a large air raid by German bombers, local people, coming out of their air raid shelters found a bus standing on end in a large crater, in Balham, London, October 15, 1940. (Photo by AP Photo)

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.