Model Luma Grothe poses on red carpet as he arrives for the screening of the film “Julieta” in competition at the 69th Cannes Film Festival in Cannes, France, May 17, 2016. (Photo by Regis Duvignau/Reuters)

A protester from the People for the Ethical Treatment of Animals (PETA) displays a placard from a bathtub as a people looks on during a demonstration to call on the public to eat more vegetables to save water, in Sao Paulo on August 2, 2016. (Photo by Cris Faga via ZUMA Wire)

Members of Chinese Shaolin Temple Warrior Monks perform martial arts during the “Cultures of China, Festival of Spring” Gala in Toronto, Canada, on February 27, 2016. (Photo by Zou Zheng/Xinhua/Sipa USA)

Actress Penelope Cruz attends a photocall promoting the film “Chromophobia” at the Palais during the 58th International Cannes Film Festival May 21, 2005 in Cannes, France. (Photo by M. J. Kim/Getty Images)

A woman is consoled by her relative as she mourns after seeing her house getting burned during a fire that broke out in one of the houses and got spread in more adjoining houses, in a residential locality in Srinagar, November 21, 2016. (Photo by Danish Ismail/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.

Megan Barton-Hanson attending the ITV Summer Party 2019 at Nobu Shoreditch in London, England on July 17, 2019 holding hands with Demi Sims. (Photo by SOPA Images via Getty Images)

“MS Herald of Free Enterprise was a roll-on roll-off (RORO) car and passenger ferry owned by Townsend Thoresen. She was one of three ships commissioned by the company to operate on the Dover–Calais route across the English Channel. The ferry capsized on the night of 6 March 1987, moments after leaving the Belgian port of Zeebrugge, killing 193 passengers and crew. This was the deadliest maritime disaster involving a British ship in peacetime since the sinking of the Iolaire in 1919”. – Wikipedia

Photo: The wreck of the Herald of Free Enterprise, which capsized near Zeebrugge on the 6th of March 1987. (Photo by Hulton Archive/Getty Images). 1987