Edit: obligatory explanation (thanks mods for squaring me away)…
What you see via the UI isn’t “all that exists”. Unlike Reddit, where everything is a black box, there are a lot more eyeballs who can see “under the hood”. Any instance admin, proper or rogue, gets a ton of information that users won’t normally see. The attached example demonstrates that while users will only see upvote/downvote tallies, admins can see who actually performed those actions.
Edit: To clarify, not just YOUR instance admin gets this info. This is ANY instance admin across the Fediverse.
Your public IP stays the same for long periods of time, is geographically tied, and also associates you to certain ISPs based on your address space. How long does it stay the same? Months - Years potentially depending on the lease set on the IP.
Well… not in Germany. Here you have to request a static ip