The green dots are a measurement for the amount of posts/replies someone has made.
The reputation is a measurement for how many times someone has clicked add reputation power to a users name. To add reputation power, you click the sherif star next to blog this post under a post. You would add reputation if you found a post really helpful or the like.
While they do nothing for me, things like that have been found to increase interaction on forums. I don't know if this forum uses them for the same reason, but ultimately, they don't really mean anything.
A forum community dedicated to the frugal lifestyle and the enthusiasts. Come join the discussion about simple and green living, cost effective tips, life hacks, debt reduction, recycling, gardening, other homesteading techniques, and more!