Hi,

First, thanks for putting all of this together! Maybe some additions you may consider to add to your post, if you want of course. There is no obligation ;)

First, about the SCOAP3 initiative. It is a particle physics initiative where a fee is paid to all publishers. In exchange, all particle physics research articles are freely available to anyone. It is not really open access, but it is already a progress.

An interesting other example in particle physics is the JHEP journal which is a peer-reviewed journals that is entirely online and free.

You may also want to check the pevo project.

And one of my major concern with a blockchain-based platform is the referral system. We are discussing this on the #pevo chat (please join us if you are interested).

PS: I know I already discussed this on my blog, on other blogs and on the #pevo channel, but I do not remember if you were around ;)