1. Thanks for the link on github, I knew about that discussion, I will open a new issue.
2. That's exactly the idea, people will become very conscious about what they can make by having their posts votable and it will very soon become self-regulating. I think that a relatively small percentage of users will have their posts votable over 30 days, but that will still be significant. I did a few simulations yesterday, it looks interesting.
3. :)
4. Yes, implementation should be as tight as possible. But as I see it right now, it's quite ok.

Thanks for the contribution to the debate, again.