There isn't one. The +/- system here is very basic and doesn't provide any information at all.
That was essentially Ape's question.
Where's the info?
Seems to me a very direct answer to that question could've been offered -- "There is no information regarding Karma" along with, maybe, a reason for that.
There are the Terms of Use. So why not a paragraph about Karma, along with a photo of Dutch, in them?
That should take care of it quite nicely.
And then the bitchslap fest continues, along with Ape's question having been answered.