I’m not sure what you mean by “true cost of business.” The biggest cost here is the issue of copyright claims and takedowns which were created by law in the first place, not by a natural phenomenon.
No matter what system we design, you’ll find that people adapt to take advantage of it. Well-meaning laws frequently have large and nasty unintended consequences. One of the biggest examples I can think of is the copyright system — originally intended to reward artists — which has led to big publishers monopolizing our culture.