Actress Olga Kurylenko poses for a photograph at the British Academy of Film and Arts (BAFTA) awards ceremony at the Royal Opera House in London February 16, 2014. (Photo by Suzanne Plunkett/Reuters)

Brazilian model and actress Alessandra Ambrosio seen wearing a Gucci fanny pack and boots from Dior on April 15, 2018 in Indio, California. (Photo by Timur Emek/GC Images)

Actress Kaitlyn Leeb poses in front of the “Total Recall” display as the three breasted woman in the Sony booth on Day 2 of Comic-Con International 2012 held at San Diego Convention Center on July 12, 2012 in San Diego, California. (Photo by Splash News and Pictures)

English actress and model Elizabeth Hurley launches Harrods beach and children's wear at the Knightsbridge store in London, England on December 6, 2006. (Photo by Daniel Deme/WENN)

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 sign is posted in front of the new Yoga Room at San Francisco International Airport's terminal two on January 26, 2012 in San Francisco, California. (Photo by Justin Sullivan/Getty Images)

“A very delicate person, beneath the flamboyance”. Jasper, Ladbroke Grove, 1977. “In the 1970s, Australia was rather cut off. I’d always wanted to live abroad, so I moved to Rome and then London. I was an art historian, but started studying photography part-time. I was interested in the demi-monde culture and began mixing in all sorts of circles. Jasper was a rather wonderful character...”. (Photo by Jane England)

A cyclist climbs over a tree fallen atop a car after a heavy storm in Amsterdam, the Netherlands, July 25, 2015. One person was killed as the most severe July storm ever recorded in the Netherlands swept across the country on Saturday, delaying flights and disrupting road and rail traffic. Dozens of flights were delayed at Amsterdam's Schiphol Airport and authorities warned travellers not to take to the road as gale-force winds and rain lashed the country, prompting the meteorological service to issue a “Code Red” warning. (Photo by Cris Toala Olivares/Reuters)