By Karin Wright The BBC is hoping to cash in on the success of The Traitors with a spin-off quiz. In The Chosen Ten, 15 candidates must nominate 10 players a day to take on a Mastermind-style quiz to grow the team’s pot of cash. To be picked, contenders will have to say why they are the best suited to take part. But among the players are ‘Bluffers’, who have blagged their way on to the team and are not as clever as they claim to be. And once in the hot seat, they will try to get money siphoned off the team’s prize fund into their own pots. A source said: “As they get to know each other, the co…