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.

Members of the Pussyfooters dance at the Krewe of Cleopatra Mardi Gras parade in New Orleans, Friday, February 2, 2018. Mardi Gras season is kicking into high gear with a slew of major parades throughout New Orleans. Although Carnival season officially began Jan. 6, the festivities really kick into high gear the two weekends ahead of Fat Tuesday. This year Fat Tuesday is Feb. 13. (Photo by Gerald Herbert/AP Photo)

People pose for photos among a field of cosmos flowers in a car park before high-rise apartment buildings in Goyang, west of Seoul on September 22, 2020. (Photo by Ed Jones/AFP Photo)

Dinosaur costumed actors representing Thailand's establishment at a high school student led protest in Bangkok, Thailand on November 21, 2020. (Photo by Matthew Tostevin/Reuters)

Yuliya Levchenko, of Ukraine, celebrates during qualifying for the women's high jump at the World Athletics Championships on Saturday, July 16, 2022, in Eugene, Ore. (Photo by Ashley Landis/AP Photo)

Women lie in the sun in Domino Park as high temperatures hit the region in Brooklyn, New York, U.S., August 29, 2018. (Photo by Andrew Kelly/Reuters)

Italy’s Alessia Trost reacts after competing in the women’s high jump during the World Athletics Championships in Doha, Qatar on September 27, 2019. (Photo by Aleksandra Szmigiel/Reuters)

The new MacBook Pro is shown during the keynote address at the Apple 2012 World Wide Developers Conference (WWDC) at Moscone West on June 11, 2012 in San Francisco, California. This is Apple’s latest flagship laptop featuring an updated processor and a super high resolution screen that features 5.1 million pixels – 3 million more than a typical high-definition television.