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.

This incredible panoramic photographs are distorted to create miniature worlds and terrifying tunnels. (Photo by Caters News)

Meet the world's smoothest cuddliest hedgehog. Names after brave hero, but Nelson is completely bald so when curled up he looks like an egg. Doesn't have a single prickle or strand of hair. Thought to be suffering a stress related alopecia following a trauma in the wild. Volunteers have been massaging him for half an hour a day for the last year to encourage spikes to grow. Now given up but he still gets daily massages because he enjoys them so much and to keep his cuddle skin soft and smooth. Unlike his namesake Nelson could not defend himself so will live out his days at the Foxy Lodge Wildlife Rescue in Hemsby, England. (Photo by Jeremy Durkin)

A woman wearing a wedding dress takes part in the so-called “brides' match” at the FIFA Fan Fest in Kazan, a host city for the 2018 FIFA World Cup, Russia June 30, 2018. (Photo by Alexey Nasyrov/Reuters)

Belarusian law enforcement officers detain a woman during an opposition rally to protest against police brutality and to reject the presidential election results in Minsk, Belarus on September 19, 2020. (Photo by Tut.By via Reuters)

“The Baja California Pronghorn or Peninsular Pronghorn (Antilocapra americana peninsularis) is a critically endangered pronghorn, endemic to Mexico. The wild population is estimated at 200”. – Wikipedia

Photo: Two rare Peninsular pronghorns, male twins was born at the Los Angeles Zoo on April 24, 2009 in Los Angeles, California. Only 250 antelope-like Peninsular pronghorns are believed to exist in the wild. (Photo by David McNew/Getty Images)

A girl broadcasts at live streaming talent agency Three Minute TV in Beijing, China on April 12, 2017. Three Minute TV also arranges cosmetic surgery at partner hospitals for its anchors, arranges small bank loans for the surgery, photographs and markets the anchors and helps them find acting opportunities Deng said. (Photo by Damir Sagolj/Reuters)

A Mexican soldier burns coca plants in the mountainous area of Atoyac de Alvarez, Guerrero state, Mexico, on February 15, 2023. (Photo by Francisco Robles/AFP Photo)