The point of the article is to show that the work students are already completing is, as of now, helping no one other than the student themselves. Rather than have the effort already being put into it going to waste, the author is proposing that students make contributions to the scientific community as part of their learning. I fail to see how this is in any way a negative situation--the same amount of work creates a more beneficial product. What students complete as their homework (again I have to stress that they're going to be doing it as part of their education regardless) disseminates scientific information, contributing to actually lower the walls the modern university-business is built upon.
Therefore your analogy is irrelevant to the situation. If I paid for a course, then didn't go to that course and instead sat in my professor's office and alphabetized his bookshelf, then it would be. Instead, under this method of teaching, I am taking the end-products of my learning that will be produced regardless and helping others with it.
If you would like to argue that publishing a scientific paper via the coursework his students would be doing anyways for his class is the same as paying money for a service and receiving nothing in return, go ahead.
Additionally, I find your need to patronize me as "kiddo" both unnecessary and ironically immature.