It's Quora. They pretend to discourage answers with such a low weight-to-usefulness ratio, but in reality those are highly rewarded - not only by the users with upvotes, but by Quora themselves by promoting those answers even in excess of their upvote count and awarding the authors Top Writer status etc. It's the way things are done there, and it's why (despite having been a Top Writer myself for two years in a row) I left.