I'd hate to state the obvious but why Github? It's quite a big barrier to entry for the average person (especially in places with low literacy) to write in MD,

I'd hate to state the obvious but why Github? It's quite a big barrier to entry for the average person (especially in places with low literacy) to write in MD, make a pull request etc. Why not just use a public Google doc or something? Don't get me wrong. I get where you are coming from but I have gone down the Github route on a few similar projects and regretted it.