That karma is too easy. I've gotten 3 and I don't know why. ??
You really should look at MikroTik's forum. When you give karma, it is given for a specific response on a specific topic by a specific user, and all that info is in the PM to the receiver, plus a message from the sender why the karma was given.
Also, the amount of karma you can send depends on your karma.
It is not a YouTube "like" kinda button.