Erin Brooks of Canada surfs in the Heat 3 of the Round of 16 during the 2024 GWM Sydney Surf Pro at North Narrabeen Beach on May 12, 2024 in Sydney, Australia. (Photo by Andy Cheung/Getty Images)

Donald Trump is flanked by Playmates at a party celebrating Playboy magazine's 45th anniversary at the Life Club in New York on December 3, 1998. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)

England’s Natasha Hunt pours champagne into the mouth of Zoe Aldcroft as she holds the trophy after England beat Canada 33-13 in the Women’s Rugby World Cup final at Twickenham in London on September 27, 2025. England became world champions on Saturday in front of 81,885 spectators at Twickenham’s Allianz Stadium, while overall 444,465 tickets were sold during the tournament. (Photo by Garry Bowden/ProSport/Rex Features/Shutterstock)

Spectators watch Austria's Stefan Kraft in action during the Viessmann FIS Ski Jumping World Cup Willingen on January 31, 2021 in Willingen, Germany. (Photo by Wolfgang Rattay/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.

Wearing a mariachi hat, candidate Clara Brugada, who is running as a delegation leader under the ruling party Morena, smiles as she greets supporters on the last day of campaigning ahead of the June 6 mid-term elections, in the Iztapalapa borough of Mexico City, Wednesday, June 2, 2021. (Photo by Marco Ugarte/AP Photo)

People in full medieval armor take part in a combat at Central Park in New York, U.S., August 14, 2021. (Photo by Eduardo Munoz/Reuters)

Astronauts Harrison Schmitt (left) and Eugene Andrew Cernan practice taking geological samples at the Kennedy Space Center in Florida, in preparation for NASA's scheduled Apollo 17 lunar landing mission, on August 28, 1972. Schmitt is the Lunar Module Pilot and Cernan is the mission's Commander. They are training for their period of EVA (extravehicular activity) on the Moon. (Photo by Space Frontiers/Getty Images)