"JSTOR is basically a scam. It pockets the money that it receives and doesn't pay anything back to the authors"
We are not talking about "authors" in the sense of some guy living in a townhouse, smoking a pipe and drinking scotch while writing a novel. We're talking about people who are paid to do scientific research, usually by the government, and who must publish their work in a journal or conference to continue continue or advance their careers.
Really, JSTOR is not even that bad; they are a search service. Look at the journals themselves if you want to talk about a scam: the authors are not paid by the journal publishers, the journal publishers do not fund grants any more than any other tax payer does, and it is often the case that the reviewers of the articles (peer review, the foundation of scientific publishing) are unpaid, and in some cases even the editors of the journal are volunteers. What do the journal publishers do? They print and bind journals, sometimes, or else they charge people (including JSTOR) for access to electronic copies of the articles. Journal publishers are an anachronism that is being kept alive by an out-of-control copyright system; JSTOR is just an outgrowth of the problem, like a little hair growing out of a cancer (and make no mistake, "cancer" is an apt description of journal publishers: they get in the way of scientific research and make it harder for scientists to make their findings available to humanity).