the only way you can get 99% positive is to play the difference between 2 bookies which is time consuming and you need lay 2 big beats to get the 1-2% return. you could look at it as part of your portfolio. anyway i was up almost 4k at 5dimes but cashed out. just left $14. i just don't have the time. either you do it casually or gamble.
If you middle two bookies and lose, you still pay vig, no?
For instance, if the total is 44 with one, and 46 with the other, bet $100 over 44, $100 under 46, hoping to middle. Unless it's 45 or a push, you lose $10.
Or is that not what you meant?