I've found the LessWrong editing service to be a pretty exciting way to provide copyediting, proofreading, feedback etc. to lots and lots of individuals over the last several months. Perhaps an expansion of that model could be valuable? This month there were 32 posts I did copyediting for through the service, which is more than usual but not by too much. That's way more than I would have even actively trying to promote myself, and I haven't had to do the promoting (or handle billing with a whole bunch of individuals). If there's more money for centralized-funding-of-edits, I at least continue to have excess capacity there and find it a lot of fun!
As a reminder in case people were unaware, we provide free editing services on LessWrong for anyone above 100 karma on the site: https://www.lesswrong.com/posts/nsCwdYJEpmW5Hw5Xm/lesswrong-is-providing-feedback-and-proofreading-on-drafts
Just click the "Request Feedback" button when you are writing a new post, and a chat window will pop up asking you what kind of feedback you want, and within 24 hours someone will have left comments and suggestions on your post.
FWIW: highly, highly recommend LessWrong's editing services! Justis Millis in particular gave excellent feedback, across the gamut of low-level formatting to high-level content ideas, in a stunningly short amount of time (<48h, iirc).
Thanks! Yeah, I think right now I do ~all the feedback requests, and my goal tends to be 24h turnaround time or less (though it does sometimes get closer to 48h).