Arbitrage opportunities exist in most markets, and while they may be seen as a drain on the system - ultimately they have the net effect of keeping markets sens

Arbitrage opportunities exist in most markets, and while they may be seen as a drain on the system - ultimately they have the net effect of keeping markets sensible. THere's no free ride.... if people are making a killing on some arbitrage gap (whether on the global economic markets, or betfair, or multiple offshore gambling sites) - the market will eventually correct for it as the arbitrage activity becomes part of the market. There's no free ride.