Australian professional boxer Ebanie Bridges at the weigh-in ahead of their IBF World Bantamweight Title fight against Shannon O'Connell during the weigh in at Aspire, Leeds, United Kingdom on Friday, December 9, 2022. (Photo by Andrew Couldridge/Action Images via Reuters)

A woman sits in a cell at the Los Angeles County Women's jail in Lynwood, California April 26, 2013. (Photo by Lucy Nicholson/Reuters)

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.

Revellers brave the chill and jump into the water at Carnlough, Co. Antrim, Northern Ireland on January 1, 2024. (Photo by Arthur Allison/Pacemaker)

A model wears a creation as part of the Dolce & Gabbana women's Spring Summer 2024 collection presented in Milan, Italy, Saturday, September 23, 2023. (Photo by Antonio Calanni/AP Photo)

Lebanese actress Rita Hayek shows her 10km medal after participating in the 9th edition of the Women's Race in Beirut on March 19, 2023, under the slogan “Draw Your Path”. (Photo by Anwar Amro/AFP Photo)

A woman wearing a protective mask stands as she waits for the bus at the sidewalk, after Indonesia confirmed its first cases of coronavirus, in Jakarta, Indonesia, March 4, 2020. (Photo by Willy Kurniawan/Reuters)

In this April 2, 2015 photo, dog owner Laura Aquilina strolls with her two year old Rottweiler Brutus, who was recently fitted with prosthetics on all four paws, and is currently learning to use them, near Aquilina's home in Loveland, Colo. Brutus lost all four paws to frostbite as a puppy while under care of a breeder, and Aquilina began caring for him about a year ago. (Photo by Brennan Linsley/AP Photo)