Crash is definitly right on this one in the sense, that say you have a progresssion (just for exampe) 1,3,5,7,10,14, 18, 25, having a ave SP of 3-1, (and a pot of say 20% at level stakes) so over a long, long period you would have bet 1 unit 500 times, 3 units maybe 450 times, 5 units say 400 times, etc etc, in every case the ave. SP still remains at 3-1, and the POT 20%.

But there is another aspect here, it's how it sit's with the individual, I mean it regulates your betting and keeps your attention.

Many punters including myself b4) tend to back according to what they have in their pocket at that moment, $10, $30, $100 $10 $20, etc etc disaster, inevitably you end up with $10 on the winners and $50 on the losers.