What are the core functions of a journal?
1. facilitate reviews
2. distribute articles selected through #1
It seems to me that #2 is where the potential for restrictive and exploitative business models really shows up. The curation function #1 should be something that can be accomplished at nominal expense. Universities should be able to fund that collaboratively for very low cost, pro-socially without a need to recuperate those costs. Why don't we see that? I suspect that it's the existing journal industry blocking such a development.