I've experimented with "index" and "wiki" posts at Ello. Respectively:

https://ello.co/dredmorbius/post/dlz9c2z6x-tvkd7rxtxwpw
https://ello.co/dredmorbius/post/vbmqbwmjovwz-pwjg6isna

You might find some nuggets buried in there. Or turds.