I don't disagree with you, though don't necessarily agree, either because I don't know that passionate people are communicative people. I know many passionate people, myself included, who've been known to be rather introverted.
After reading some of their comments & the copy on their homepage, the creators of Luna sound like they could be fairly mindful people. I'm betting they're seeking people who enshrine certain values to seed their community with & want to privately establish a relationship with them. I find this approach appealing to my introverted side, as a result.
The next mindful step would be to open things up to everyone immediately to allow the ensuing flood of extroverts & introverts alike. This approach seems like it could counter starting off with winner-take-all mechanics in the community's culture.
Then again, all I know about the product is from the first bits of text on their site & this post. I didn't know they weren't simply allowing everyone in until this thread. I could be totally off on how they're rolling. If I am, I'll have to take some time to examine my confirmation biases.
crawfordcomeaux I'm really curious about your further thoughts. Could we chat more about it? Would you be so nice and drop me a line to wojciech @ luna-lang.org ?
Let everyone check it out, the passionate ones will engage more through any channels you have (mailing lists, chat, twitter) and be easy to find, IMO.