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.
