"Merely that marginal cost does absolutely play a role and that people are really driving it down" Which isn't true. The marginal cost of copying random bits

"Merely that marginal cost does absolutely play a role and that people are really driving it down" Which isn't true. The marginal cost of copying random bits is the same as the marginal cost of copying Microsoft windows. The piracy culture that has become rampant in the last 10 years is driving the cost down.