So, as I understand it, and correct me if I'm wrong, the core of #Mastodon's timeline is the #protocol that hands off everybody's posts on one instance, to all the other instances.
#Threads is an instance on the protocol that Masto uses to share posts across the world.
As I also understand it, while an instance may block incoming posts, that doesn't stop outgoing posts going to that instance, nor between people where one has migrated to the blocked instance.
Ergo: Threads is doing what I came to masto from #facebook to stop participating in - the largest #datamining and user manipulation experiment in the history of advertising.
Yes, Masto itself is cool, but like any tool, it can, and is, being used for evil. In the case of threads, it's the "hoovering up", analysing and using all of our data to manipulate people. Maybe not manipulating us, here, but certainly manipulating people on any timeline that Meta owns, and any customers of their advertising clients. And our data gives them more reaction measures, a superthread of human reactions and the goads that alter people's choices subconciously.
I'd argue that Threads isn't just data mining, it's stealing our reaction history. I destroyed my facebook account when I left. I withdrew my consent to be data mined. Now, even this post, where I again restate my position that I do not consent to my data being used as human reaction analytics, they are likely using threads to pilfer the data of even people who are not consenting to them pilfering it. That means I am seriously considering leaving the fediverse.