Since it's required to have an account for upvoting, then you might want to consider adding a downvote option as well.
^{- What security measures you have in place for possible abuse cases in terms of votes?}

IMHO, it has a very slim chance of finding success without having to heavily rely on some sort of promotion. I don't think users will help in terms of filling it in a significant way so you should only rely on yourself and hope for the best.