An Icelandic mare and her foal stand on a meadow at a stud farm in Wehrheim near Frankfurt, Germany, Tuesday, June 17, 2025. (Photo by Michael Probst/AP Photo)

Pakistani youths cool off in a stream during hot weather on the outskirts of Islamabad on April 29, 2016. Pakistan's Meteorological Department has forecast hot and dry weather in most parts of the country with the highest temperatures recorded at 41 celsius in the southern Sindh province. (Photo by Aamir Qureshi/AFP Photo)

Iraqi paramilitary troops fire towards Islamic State militants during a battle with Islamic State militants on the outskirts of the ancient city of Hatra near Mosul,Iraq April 26, 2017. (Photo by Reuters/Stringer)

This aerial picture taken on June 29, 2024 shows fishing boats moored at a beach in Danang, central Vietnam. (Photo by Dale De La Rey/AFP Photo)

Alex Plunkett, left, and Sean Hart, both of Arlington, Va., join hundreds participating in the annual International Pillow Fight Day on April 5. Massive pillow fights broke out on the Mall in Washington and in cities around the world. (Photo by Marvin Joseph/The Washington Post)

A Ukrainian mortar crew in the last decade of April 2024 fires a 120mm round at the Russian positions as soldiers defend the city situated halfway between Bakhmut and Kostyantynivka, which has become the primary target of Russian attacks. (Photo by Anadolu/Getty Images)

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 motorcyclist carries three young woman as he performs a wheelie on his motorbike during an exhibition in the Chapellin neighborhood of Caracas, Venezuela, Sunday, June 12, 2022. (Photo by Matias Delacroix/AP Photo)