You are right @d3nv3r, I remember I made a simple comment (sorry i just forgot what topic it was) and it so happen that @dantheman was there and he voted my comments shooting the comment rewards to $132.
@mrgrey also had this experience but his was way too great $1000 + for just a simple comment.
This kind of incident is very seldom but its good to think that somehow we can earn rewards by posting good comments.
Yup! Just need to draw more attention to the comments section so more votes go where they should.