Thank you buttscicles (hard saying that with a straight face) for OP'ing this thread and to Joe Alcorn for the amazing original article.
I haven't shared this yet -- it's more for the community, but I've tried to address various questions from the community and distill answers + resources for Open Library here:
https://blog.openlibrary.org/2020/12/13/importing-your-goodr...
Tried my best to include others players in the space (wikidata, inventaire, bookbrainz, worldcat, bookwyrm) who are doing great work and pay respects to readng, storygraph and other innovative services which are breaking onto the scene.