Like many interesting ideas in search, this one&#x27;s been tried several times. Blekko and Bing both used Facebook friends&#x27; likes for votes, but coverage was low. Google toyed with up&#x2F;down votes for a short while after Wikia Search launched, but I suspect the overwhelming majority of votes were malicious.<p>On the other hand, using result long-clicks as votes is quite popular, and seems to work well.