I tried to look at your GitHub, but the link (
https://github.com/NxtEM/NAX) goes to the GitHub 404 page.
I do like the idea of requiring everyone in the one-half of the distribution to make a meaningful comment. That should dissuade a lot of sock puppet accounts. Have you considered limiting the distribution to members with a certain activity level to make it even harder for sock puppets?
Do you have any plans around preventing whale investors from making large contributions to the investment fund and preventing some stakeholders from holding outsized NAX positions?