Here’s my thought.
There is already a system for collecting links. People register their site and then periodically links are collected.
What if we had the same sort of system, but for TW documentation? The harvester would pick up the changed tiddlers and import them. The results would be published to something like {address}/tw-beta.html and would include disclaimers indicating that the texts have not been fully vetted. The warning could appear at the top of every tiddler even and could direct people to tiddlywiki.com for authoritative information.
Then, periodically, volunteers could turn submitted tiddlers into PR’s on the main project. This way average people could contribute with a minimal of exposure to GH, allowing updates and fixes to happen faster.
Something like this happens in the Linux world, where distributions are either stable or unstable. The unstable distributions have the latest updates and software, but haven’t been fully vetted. The stable distributions have been around for awhile and are considered safe.