Key point: "to you". I imagine that if the $0 option wasn't included, many of those who chose it would simply not "buy" it at all. So at least they get some mar

Key point: "to you". I imagine that if the $0 option wasn't included, many of those who chose it would simply not "buy" it at all. So at least they get some marketing benefit out of it. Of course this works better for those "pay what you want" digital goods, where there isn't much marginal cost to giving away a copy.