Participants react as they try to reach the top of a greased pole to collect the prizes, during a “Panjat Pinang” competition, that is held to celebrate Indonesia's 79th Independence Day at Ancol in Jakarta, Indonesia, on August 17, 2024. (Photo by Ajeng Dinar Ulfiana/Reuters)

Cape fox cubs play fight in the last decade of May 2025 in the Kalahari Desert, South Africa, their silver and yellow fur camouflaging them in the desert. (Photo by John Mullineux/Solent News & Photo Agency)

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.

Dana the dog wears glasses as people watch an annular solar eclipse, in Las Horquetas, Santa Cruz, Argentina, on October 2, 2024. (Photo by Agustin Marcarian/Reuters)

People enjoy their time during the last day of the Dubai Expo 2020 in Dubai, United Arab Emirates, Thursday, March 31, 2022. The world's fair in Dubai, the pandemic-delayed Expo 2020, closed on Thursday after six months of concerts, conferences and festivities. (Photo by Ebrahim Noroozi/AP Photo)

A member of Wagner group stands guard in a street in the city of Rostov-on-Don, on June 24, 2023. President Vladimir Putin on June 24, 2023 said an armed mutiny by Wagner mercenaries was a “stab in the back” and that the group's chief Yevgeny Prigozhin had betrayed Russia, as he vowed to punish the dissidents. Prigozhin said his fighters control key military sites in the southern city of Rostov-on-Don. (Photo by AFP Photo/Stringer)

Erzhena Zhamyanova (“Amar Sain” theater) and Buryat folk instruments orchestra – Dance Monkey. “Dance Monkey” is a song by Australian singer Tones and I, released on May 10, 2019 as the second single (first in the US) from Tones and I's debut EP The Kids Are Coming.

宇多田ヒカル (Utada Hikaru) –One Last Kiss. Utada Hikaru is a Japanese-American singer-songwriter and producer. By the end of the 2000s, Utada was deemed “the most influential artist of the decade” in the Japanese music landscape by The Japan Times. Utada's commercial success has made her one of Japan's top-selling recording artists of all time.