http://u.qdnx.org/file/rozzin-20131208T082039-ee65x7e.html
#q "If someone has paid $X to have the word "FREE" typeset for you and N other people to read, their expected value for the money that will move from you to them is at least $(X/(N+1))" http://m.xkcd.com/870/ #xkcd