Play the odds on today's American Football with the Betfair Exchange. You can back or lay a team, limit your liability and Cash Out at anytime. Bet on this weeks football with Betfair. Join Betfair and bet with the best odds. We also offer Casino, Poker, Games and Bingo. The Betfair Exchange allows you the opportunity to back and lay bets and Cash Football. Tennis. Cricket. Basketball. Rugby Union. 1 X 2. Altos PI v Santos AP. Cricket · Football · Horse Racing · Special Bets. Exactly what a betting exchange is. Transfer Specials Betting Tips: Betting exchanges have had a revolutionary impact on the sports betting industry and they now lead the way on odds, with bookmakers following in their footsteps. Traders who use Betfair as their main sports exchange will have to pay a commission - but only on betting markets they win on. The first of these is when your selection drifts in price after you have decided to lay a bet.