Comment by sporkydistance

Sorry, I was refering to Hacker News, not all social media. My question was unclear.

1. HN is centralized, but not for-profit.

2. HN does not drive engagement, AFAIK

3. HN is not surveillance capitalism.

You haven't demonstrated how Usenet differs from HN, but since my question had a typo and omitted HN, I can see how that is confusing.