i think it is advantageous to look for how sharing information can help you. with regards to a developed system, how can you share information for your benefit? here are some ways:

1. share information and encourage others to make improvements and share their thoughts
2. use it as an advertisement for something else; for instance, you can give your system and sell trade execution services, or mentoring for the system
3. use it to earn "goodwill"; sharing information is a good way to earn trust, which can be monetized in many ways down the road. the adage, "it's not what you know, but who you know" comes to mind.

i personally think reason #2 will lead to most non-personalized, mass marketed media to be free, though it is going to take some time; i feel we are in a transition phase between the property rights knowledge economy and the open source knowledge economy.