No it doesn't because there are still fixed costs. Even if it costs me the same to send out a software license to the 100th person as it does to the 101st person, I still have to pay to develop the software, pay the rent, the fixed subscription fee of whatever it is I'm using behind the scenes to develop it, host it, etc.
Sure, but do the fixed costs really justify the current pricing? The last paper I submitted, the gold open access fee was $3k... Forget it, we just put the preprint on arXiv, which has no problem hosting versioned preprints at no cost to the authors.
I was really only commenting on the statement "Zero marginal cost means that a competitor can come along at any time and charge a zero price." There ain't no such thing as a free lunch.
