Meta can always profile you from the content you post to the fediverse, and they don’t need Threads to do it. In the fediverse, every upvote, every down vote, every comment, every ban, and everything else is a matter of public record that can be easily queried by anyone without logging in to anything.

There isn’t practically any way of blocking your content from being seen on another platform. It’s an arms race and you’ll always lose. Look at Reddit, they had a whole campaign to kill their API, and most of their quality content is reposted here through bots. If you post something on the internet, there it no way to ensure it doesn’t appear on Threads, where you posted the content originally doesn’t change that fact.

I’ve been staring at it for 10 minutes and I’m still not convinced it works.

This is true, but when I slack you at 4:00AM…

Godspeed my friend. 10/10 I would use that irresponsibly.