Agreed. But, there are a ton of people who want a place to share ideas and see them come to fruition - most can't do it on their own so they need help. And what could be better than a closed, tight, perhaps even paid community where users can exchange ideas, prototypes (closed, open), code, work on projects together, seek interest, advisors for two common goals really: make cool software together and make a ton of cash.

There's one thing you forgot here: They want to do that in one place. We're already doing all that here, today. We work on code using GitHub or similar services. We present our work on HN. We've got endless means of communication. And bottome line, we are a community. But, it's spread out all over the internet. I see where your question's going, which is why I wanted to clarify it a bit.