I cant believe that accounts are being closed over such little wins

The theory of bookmaking is as follows...

A bookie has complete control over the odds he offers, but initially he doesn’t know the volume of bets that will be made at those prices. What he is basically trying to do is adjust the odds he offers in order to take bets in the right proportions to take in enough stakes across the board so that the amount he pays out is less than the stakes he takes in from the losing selections. If he achieves that goal then he will not be concerned which horse wins.

So if the above is true then why would they care if you won $4000 when in reality they more than likely won on the race regardless?

I bet in large amounts and never have I had an account closed or limited. My mates who only bet on the specials and "offers" who bet small amounts have those offers taken away but never closed.

Just my thoughts....