No idea. I can only assume (due may lazyness of not caring to find out) that only premium members can vote. Either that, or the score is based on favorites vs. unapprovals, which I doubt.
Sammykins said: actually, the moment the clone is "born" your experiences and thoughts are different, making you a different person therefore it is not masturbation.
But aren't they the same entity merely breaking the laws of nature with their existence?