That the marginal cost of copying media is zero is a pretty mundane observation. The author goes beyond this to hypothesize that demand moves according to some abstract "fair price" (that happens to suit the author's semi-Marxist definition of fairness), and that piracy only occurs when the market price is set above this value. This second point is the only <i>novel</i> bit of the author's post, and it's just not very good.