Making Money on the Internet

The internet, and computing in general, is clearly a disruptive technology that is throwing a monkey wrench into everything from how people sell their used furniture to the music industry. So the question becomes when most physical things are free or nearly so and digital media drives the cost of entertainment to zero, how do you make a living? In the past, this was only supposed to be a problem for musicians, authors, etc. but 3D printing will move that problem into many other industries.

Here is one idea. I'm not sure I buy it, but it is interesting to contemplate how, or if, this would work.