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Thankfully, this is not how the world works, or 2+2 would not exist!!!

[/ QUOTE ] So, using 2+2 is a positive-sum game for a most people. People can post hands and get feedback on how best to play them, and the people who write the advice get experience in thinking clearly about hands, as well as getting feedback on their advice. The negative effects of teaching others how to play better are small in comparison to the improvement it gives each individual who participates.

In contrast, there's no reason to share a program that can actually make money trading. If you don't share, you can just let the program trade for you and go retire in Aruba. If you do, you have to package and market it (and buying big blocks of time for infomercials can't be cheap). Then when 1000's of people are using it, the profit margins will get squeezed so that nobody makes much money after considering broker fees and bid/ask spreads.

Of course, if the program doesn't really work, it's a pretty easy decision about whether to share it or not...