The follow point values are tentative values are the same as they are now. As time goes on these point values will be reevaluated and we'll decide if they are unfair and try to figure out what would work better.
10 points => When you share a tutorial, model, or gallery item.
3 points => When someone becomes your fan (if implemented).
1 point => When you post a comment, make a post in the forum, or someone likes something you posted.
All the extra places to earn points means we need to adjust our ranking system. Personally, I've always liked the idea of a sports theme. Like points, the rank values will be reevaluated as time goes on.
Plus (+, ++) ranks are mainly to provide more ranks to reach. I deliberately made Pro quite difficult to achieve, but that really depends on how often people like things and become fans. Just for reference, here are the existing leaderboard scores. No one even makes AAA class, but keep in mind I added likes recently (which had barely been touched) and the ability to become someone's fan doesn't exist yet.
As for admins and mods, I don't know. I think maybe moderators could be "coaches" and the admin could be the "Head Coach". These could be little badges attached rather than ranks though.
Anyways, if you've manage to get through all that, let me know what you think.