Curated user generated content and a publisher are very different and this needs to be distinguished. This has been mixed quite a lot in the past few weeks of events.

While it is theoretically possible to moderate to th point they are close to each-other, this is not the reality of any of the cases being discussed. Such draconian levels of moderation will kill any community that was not already a full echo chamber without diversity, and not in the "oh Facebook is an echo chamber" way but in a true, cult-like following fashion.

Affiliation vs Promotion vs Allow - Publishers have directly affiliated authors. Algorithms and manually curated sets within UGC are promotion. Most all other social postings are simply "allowing". These distinctions are important, and arguably each have different legislative implications.