I'm still unsure as to how this would be double profits
Let me use an example:
(I know these teams are unrealistic, but so what, it's just an example)
Miami Heat @ Boston Celtics
@ Chicago Bulls
@ L.A. Lakers
Spread on Heat/Celtics -7 Celtics
Spread on Heat/Bulls -5 Heat
Spread on Heat/Lakers -5 Lakers
JM System: (A) bet on Heat (+10) buying 3 points
Anti-JM: (A) bet on Celtics (-7) buying zero points
Final score: Heat 90 Celtics 84
JM System: Win + 1 unit
Anti-JM: Loss - 1 unit
Continueing with the Anti-JM for Heat/Bulls
JM System: No bet due to (A) win
Anti-JM: (B) bet on Bulls +5 (buying zero points)
Final score: Heat 90 Bulls 95
JM System: No bet to to (A) win
Anti-JM: (B) win on Bulls = +1 unit
At the end of the day, you're still up just 1 unit. As a matter of fact, you'll be down money due to the juice involved with point buying. The only way you can play these systems against each other, is if you win both of the (A) bets, which is most likely extremely rare. That would be the JM system play would have to win because of the 3-point buy that you originally made, which according to my records happens about 5-10 times per year. That wouldn't be enough to make up for the loss in juice
Correct me if I'm wrong...?