UK Love Island star Lucie Donlan, 24, goes from appearing on reality TV to treading the boards – as she poses barefoot with a skateboard in California in the first decade of May 2022. (Photo by Instagram)

Australian model Shanina Shaik arrives to attend the Givenchy Menswear Spring/Summer 2023 show as part of Paris Fashion Week, in Paris, on June 22, 2022. (Photo by AFP Photo/Stringer)

American actress Kate Hudson gives a shoutout to Italian luxury fashion house Maison Valentino in the second decade of July 2022. (Photo by katehudson/Instzgram)

A woman dressed as an angel takes a break from greeting children at a public library in Irpin, northwest of Kyiv, on December 23, 2022, amid the Russian invasion of Ukraine. (Photo by Genya Savilov/AFP Photo)

Women pray at the Sheikh Zayed Grand Mosque in Abu Dhabi in the early hours of April 6, 2024, on Laylat al-Qadr (Night of Destiny), one of the holiest nights during the Muslim holy fasting month of Ramadan. (Photo by Ryan Lim/AFP Photo)

American model Kendall Jenner in the second decade of May 2024 hits the steam room for FWRD. (Photo by Kendall Jenner/Instagram)

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.

Demonstrators take part in a protest against U.S. President Donald Trump in Glasgow, Britain February 20, 2017. (Photo by Russell Cheyne/Reuters)