Over the past year, prediction markets like Kalshi and Polymarket have exploded in popularity, as online users bet on everything from battles in Ukraine to sex toys being thrown at sports games. So with concerns over both regulation and the prevalence of insider information inviting intense scrutiny, Matt Shea and Marianna Spring discuss how these platforms really work. Top Comment is a brand new podcast from BBC Sounds, digging into the stories behind your social media feed. For more,