[davidw]

> marginal cost of production equal to zero

I think it would be more correct to write "reproduction" or "distribution", because it costs a lot to produce a movie or a book or a big, complex piece of software.

[literalusername]

Marginal cost does not include initial investment. https://en.wikipedia.org/wiki/Marginal_cost

[rictic]

It seems like you're miscommunicating over where to delineate the product. You are right that the marginal cost of the Nth copy of a particular film is about zero. The marginal cost of making the Nth film is still decidedly nonzero.

[davidw]

Right and in any event it's ridiculous to talk about a "post scarcity" world when there is oodles of scarcity surrounding the creation of information goods like movies.

[galadriel]

That's exactly what Marginal cost is, the change in total cost to produce one more copy of the same product.