UK Love Island's Maura Higgins attends the Pretty Little Thing X Molly-Mae party at Rosso on September 01, 2019 in Manchester, England. (Photo by Splash News and Pictures)

American actress Heather Rae Young feeds an alpaca a carrot stick from her mouth during her bridal shower hosted by PETA at Kindred Spirits Care Farm on September 2, 2021. On Thursday morning, PETA and rescued animals from Kindred Spirits Care Farm will host a bridal shower for Heather Rae Young in honor of the longtime animal rights activist and Selling Sunset star’s upcoming nuptials to Tarek El Moussa. (Photo by Snorlax/The Mega Agency)

Made Mohon, the operation manager of Sangeh Monkey Forest, feeds macaques with donated peanuts during a feeding time at the popular tourist attraction site in Sangeh, Bali Island, Indonesia, Wednesday, September 1, 2021. (Photo by Firdia Lisnawati/AP Photo)

Rapper Cardi B is seen in Paris, France on September 30, 2019 at Paris Fashion Week. (Photo by Splash News and Pictures)

A child wades through floodwater brought about by Super Typhoon Noru on September 26, 2022 in San Miguel, Bulacan province, Philippines. Super Typhoon Noru made landfall in the Philippines overnight, causing widespread flooding and leaving at least five dead. High winds and heavy rains have flattened villages and have increased the threat of landslides. (Photo by Ezra Acayan/Getty Images)

Andre Krumbiegel drives in a «SIL» pointed plough through the pink fog of a smoke body in Saxony, Germany on October 2, 2019. The occasion is the forthcoming Eastern Bloc meeting on 6 October in Großhartmannsdorf, to which motor vehicles and commercial vehicles from former socialist countries can be brought, exhibited and demonstrated. Photo by Sebastian Kahnert/dpa-Zentralbild/Keystone)

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.

Alfred the frog looks almost as scary as the pumpkin he is perched on at London Zoo 26 October 2011. Keepers at the zoo have joined in the Halloween tradition by supplying pumpkin lunches to some of their animals, including the giant waxy monkey frog. However Alfred is not quite the giant figure his species name suggests – he actually measures up at around 4 inches (10 centimeters). (Photo by EPA/Zoological Society of London)