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.

A woman feeds cats at Mar Elias Palestinian refugee camp in Beirut, Lebanon, on August 28, 2024. (Photo by Ahmed Saad/Reuters)

Students of the Ballet Academy prepare to perform during the school annual ceremony in Baghdad, Iraq, Friday, April 1, 2022. (Photo by Hadi Mizban/AP Photo)

An Afghan Army soldier secures the hill overlooking the Kart-e Sakhi mosque in Kabul, Afghanistan, Wednesday, March 20, 2013. Thousands of Afghans will celebrate Nowruz on Thursday, March 21, 2013 to mark the first day of spring and the beginning of the year on the Iranian calendar. (Photo by Ahmad Jamshid/AP Photo)

The Perseid Meteor Shower seen over The Scorhill Stone Circle in Dartmoor, Devon on August 2, 2016. (Photo by John Baker/SWNS.com)

The picture dated January 30, 2025 shows the Red Arrows swooping through the skies as they carry out a winter training session over RAF Waddington in Lincolnshire. The team made the most of the sunny weather to practice their signature moves, with plenty of twists and turns in the blue skies. They train in the UK until mid-Spring when they move overseas to a location with more predictable, settled weather to maximise flying hours. (Photo by Caroline Haycock/Bav Media)

A woman dries chili peppers in the sun at a village in Wuyuan County, Jiangxi province, China July 21, 2017. (Photo by Reuters/China Stringer Network)

Lauren Metzler, founder of Sydney Mermaids, prepares for a swim at Manly Cove Beach in Sydney, Australia, Thursday, May 26, 2022. There is a strong need, especially after COVID-related lockdowns, to simply play and enjoy creativity, Metzler says. (Photo by Mark Baker/AP Photo)