Of course, referee's decision affects games and by extension; gambling. It's a two-edged sword because a bad call from a referee will affect some bettors negatively while being a source of blessing to others. The only people who complain of referee's bad officiating are those who are at the receiving end. We've to come to terms with the fact that every club has had one or two times a referee's bad call had helped them win a game or escaped punishment.