A Palestinian holding a weapon takes cover between buildings amid clashes with Israeli troops during an Israeli raid in Nablus in the Israeli-occupied West Bank on June 13, 2023. (Photo by Raneen Sawafta/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.

Bradie, a corgi, competes in the dock dive competition during the 147th Westminster Kennel Club Dog show, Saturday, May 6, 2023, at the USTA Billie Jean King National Tennis Center in New York. (Photo by Mary Altaffer/AP Photo)

Rapper Destiny Nicole Frasqueri, known professionally as Princess Nokia performs during the Coachella Valley Music and Arts Festival held at the Empire Polo Club in Indio, California, U.S., April 22, 2022. (Photo by Maria Alejandra Cardona/Reuters)

People mourn as they receive the dead bodies of victims of an Israeli strike on March 3, 2024 in Rafah, Gaza. As of Thursday February 29th, more than 30,000 people had been killed in Gaza since the start of the war on Oct. 7, according to the territory's health ministry. Also this week, more details have emerged of a potential new ceasefire deal that could start before Ramadan, pending further negotiations by Israel, Hamas and foreign mediators. (Photo by Ahmad Hasaballah/Getty Images)

A fisherman paddles on a makeshift raft as a child swims behind him in Gaza City's main fishing harbour on September 7, 2024, amid the ongoing war between Israel and the Palestinian militant group Hamas. (Photo by Omar Al-Qattaa/AFP Photo)

A man walks past specially designed wash basins in a public toilet at the Foreigners Street on April 26, 2007 in Chongqing Municipality, China. (Photo by China Photos/Getty Images)

Hong Kong art gallery director Sarah Greene said that Wolf, known for his work depicting mega-cities, has died Tuesday, April 24, 2019 night at his home. She said he was 64. Wolf won first prize in the World Press Photo competition in 2005 and 2010. Here: Architecture of Density #119, 2009. (Photo by Michael Wolf, courtesy of Flowers Gallery)