It depends on how mant members have rated their post/s positively and who has given positive karma.
For instance, I just checked your karma level and it was zero. As an experiment, I then rated your post above positively and you now have 46 karma points, which puts you on a distinguished road.
I'm signing off today. Had a long day. Started 'Vectors' for my kid (class VII), and hope to have him digging into Halliday, Resnick & Walker, within a week. It's 2:30 AM here.
I see what you mean now. However, someone must have thought it was worth rating.
Regards Howard
Edit: On closer inspection, I can tell you it was me that rated the post. I think it was an experiment I did quite some time ago , if memory serves me right.
There is a post in Site Comments and Suggestions covering this Karma thing, I don't know why there is continued confusion, its all explained there. If you are still confused, post in that thread, there is no need for new threads about it to appear here.
Edit: On closer inspection, I can tell you it was me that rated the post. I think it was an experiment I did quite some time ago , if memory serves me right