A view of the spectacular colour of clouds at sunset on January 17, 2005 in Beijing, China. (Photo by China Photos/Getty Images)

Construction workers carry bricks on their heads near the country's parliament building in Naypyitaw November 11, 2014. Yangon lost its status as Myanmar's capital in 2005, after the former military junta carved a new seat of government from a parched wilderness some 380 km (236 miles) to the north and called it Naypyitaw (“Abode of Kings”). (Photo by Damir Sagolj/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.

Inflatable pools were set up by volunteer youth to cool children living in tents in Khan Yunis city of Gaza under Israeli attacks, on July 18, 2024. (Photo by Hassan Jedi/Anadolu via Getty Images)

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 participant tests his motorcycle ahead of the launch of the Rally of Morocco 2021, in the desert Zagora region, on October 7, 2021. The rally will be held from October 8 to 13, 2021. (Photo by Fadel Senna/AFP Photo)

View of an egg fried on the pavement in Pozo Hondo, Santiago del Estero, Argentina on January 23, 2016, while the real feel was 57 degrees Celsius. Pozo Hondo's Mayor Claudio Nicolau fried an egg on the pavement of the main square of the city Saturday. (Photo by AFP Photo/Stringer)