Uhm... well, I received a comment from Don, so is it possible that just who have karma points can see it?
@D.M
-- Mon Mar 28, 2016 4:16 pm --
Well, Adry and I tested the Karma actions, simply giving a comment on each other.
Results:
1. You can see the Karma action buttons just when you have karma points.
2. You can encrease someone else just one time, indeed after you comment someone these karma buttons desappear.