Say if I help someone out on TSR, then they give me a reputation thumbs up. I check how many points that thumbs up was and sometimes it equals to 0, while others are equal to 12?
Why is this? 0.o
It depends on how much reputation the person who gives you the rep has
Zero rep points come from posters who are new or who have no or negative rep power. Those who have received more rep points have more power in there rep. The green gems by someones name indicated how many points per rep they give. E.g. I give 8 points for 8 gems.
Because some of us are more equal than others.