I see everybody's going to leave betfair AGAIN. They must be worried :)
[Edit]
As there are so many visitors to this particular post I figured I'd calculate what the commission I paid Betfair actually was through normal laying with no trading out. I'm on the normal 5% commission on winning bets
And the result is....
41%
That somewhat surprised me. My trading bots don't pay anything like that but it's interesting to see that with a basic (and nicely profitable) non trading strategy the commission is well above the premium charge level.