Betting Exchanges have been around for many years with Betfair as one of the earlier betting exchanges to exist. Betfair are not the only players in the market. Come and bet online at the Betfair Exchange. Here you will find In-Play/Live Betting on all kind of sports and you'll also get a free bet!. Play the odds on today's Cricket with the Betfair Exchange. You can back or lay a team, limit your liability and Cash Out at anytime. In-Play Cricket · ICC Champions Trophy · England v Australia. The company does push its competitors hard in offering decent value prices for punters. More Horse Racing News. If you have a website and want to earn money promoting betting exchanges then check out Gaffg. An overround or a bookmaker margin is the adjusting of true odds into odds which ensure that the bookmaker always makes a profit of a given wager. Football Betting Live Scores.