Hackers around the world, often teenagers, are making thousands by creating and selling games cheats to a growing market. The most recent survey suggests that around a third of gamers admit to using them to improve their chances online. Cyber-security reporter Joe Tidy went to play a game with a cheat hacker to find out how the 17-year-old makes thousands of dollars a month through his underground business. In China recently, four alleged hackers were arrested for similar offences.