People take photos in a field of Yellow Desert Sunflowers as wildflowers begin to bloom in Anza-Borrego Desert State Park in California after a record-setting wet winter of rain, Anza-Borrego Desert State Park, California, U.S. March 20, 2024. (Photo by David Swanson/Reuters)

A fireman looks on as a Canadair aircraft drops water to extinguish a wildfire in Sicily's Trapani, Italy on August 27, 2023. (Photo by Antonio Cascio/Reuters)

A rescued otter cub named Mingo is receiving specialist care after being found in July 2025 in the flamingo habitat at Colchester Zoo, far from where he should have been. He is being raised with two other cubs at the UK Wild Otter Trust’s centre in Devon, UK. (Photo by UK Wild Otter Trust/Cover Images)

Hungary's athlete Anna Toth lies on track after a fall in the women's 100m hurdles semifinal during the European Athletics Championships at the Olympic stadium in Rome on June 8, 2024. (Photo by Anne-Christine Poujoulat/AFP Photo)

British South American Airways hostess Mary Guthrie with a pair of pineapples, on the return of the Lancastrian airliner 'Star Dust' to Heathrow Airport after a test-flight to Buenos Aires, 15th January 1946

A little girl hangs three Siamese kittens on a washing line in a garden in Croydon, London. (Photo by Fox Photos/Getty Images). 14th July 1931

Finding just the right spot above the clouds at Camp 1 on Ama Dablam, Danuru Sherpa uses his iPhone to catch up with friends and family. Even at 18,500 feet (5,654 meters), climbers here can check their email and other dispatches from the world below. (Photo by Aaron Huey/National Geographic)

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.