Earlier quoted context omitted.
I think this is an interesting analogy (maybe even better would be bus fare for a city bus). However marginal cost is not zero for the airline. Fuel costs money. There are limited seats on the plane. The marginal cost of copying a digital book is actually zero. However, even if marginal cost was 0 (lets say a movie theatre that is empty), it does somehow still seem wrong if its physical in a way i can't easily distin…
Problem is audience, if we had unlimited number audience, maybe marginal cost would be zero. In current situation, cost of production (including labor), is shared with intended audience. Imagine a edge case, I am writing a book to a very specific audience, lets say only 100 people would be interested. I spent lets say 100 usd. So basically cost for each reader will be 1 usd. Or maybe you developing a SaaS app, would…
??? I'm confused. You seem to be redefining the term marginal cost to mean the opposite of what its normal definition is.