On any given Saturday, Rory would spend several hours glued to a screen flickering with hundreds of football and horse racing bets placed by customers of the Irish bookmaker Paddy Power.
One of multiple insiders from firms including Paddy Power Betfair, Ladbrokes and William Hill who spoke on condition of anonymity, Rory was part of an obscure corner of the gambling industry that exists to maximise profits by clamping down on successful punters…
Punters know the house usually wins, but most have no idea that bookies sharpen their edge via something called “stake factoring”, the process by which winning customers are dialled down, while losers are allowed to bet more.