My question is, if I need to use the betfair exchange to lay a bet (when smarkets don't offer a market), won't the sportsbook see this and realise. If I bet on a selection on the Sportsbook and lay the same selection on the Exchange, is this treated in the same way as backing and laying on the Exchange or is. Bet online at Betfair Sportsbook and experience the thrill of betting. Join Betfair and bet Bet £/€10 on Exchange Get £/€5 on Sportsbook. WATCH LIVE & BET. Click here online casino download for mac get started! Betfair could now offer services associated with a traditional bookmaker as well as its established Exchange format. To claim it, simply register an account, validate it, make an initial deposit and then make your first wager. Betfair Exchange and Sportsbook - The Difference. With Betfair acting as a bookmaker in the Sportsbook scenario, there will be a built-in percentage in the market, similar to a traditional bookmaker.