You're viewing a single thread.
Only your instance host could monitor your personal metrics and fingerprinting. These are what are so invasive with big tech.
Everything you post here as content is public and can be scraped you should assume everything will be mined for data.
They can't see your IP, dwell time, votes, what you read, what you didn't read, and most importantly they can't inject content into a structured echo chamber and observe how you react.
Only your instance knows your IP and what links you visited. But everyone can see your votes.
How does everyone see votes? I looked in the page source and could find comments but not votes
If you host a federated instance you can see all votes. Some platforms display votes in the UI (kbin I thought? by hovering over the vote button or score). I figure it's only a matter of time before someone puts up a website to just see people's votes.