Ferru123 wrote:
You may be right, but surely Betfair would then risk taking substantial bets that were arrived at by professional gamblers (or placed on their behalf).
Of course, but that's the same for every bookie. That's why they restrict winners. You'd do some homework on the prospective customer then see how they bet. If they're betting cluelessly carry on, if they look like they've got info or they're smart money say "it's not working out the way we expected, thanks but no thanks".
Ferru123 wrote:
I know Wayne Rooney lost a fortune on the horses, but I would say that most people with Wayne Rooney's wealth are higher up the evolutionary tree than him!
Most people probably are, so don't bet with them! Bet with the clueless. And just because someone's made money in business or whatever, doesn't mean they have the foggiest idea about betting. Ladbrokes famously made nearly £200 million in just 2008 from the mega-wealthy, mega-clueless, so they definitely exist.
Ferru123 wrote:
Traditionally, if a horse at evens won, the bookies would take a haircut. So it is not possible that the bookies will say to Betfair:
'We'll give you a value bet if you let us back this horse with you. If the horse wins, our losses are mitigated (particularly as laid the horse at lower than its true price on Betfair). Over 1,000 races, we both get a smoothly rising equity curve.'
The big bookies tend not to care much about smoothing their returns. Why give away money to Betfair to smooth your daily returns when you only report every six months? And why would Betfair have a bigger appetite for risk than the bookies anyway? And going back to your first point, if a bookie is trying to get a bet on with you (rather than stand it themselves), then I would have thought the chances of it being pro money in disguise is much, much higher than if the person on the other end of the phone is a footballer.