Can’t make money with the information that is public, they need the social connections to people that will see ads. They want to know our interests, and the interests of all the people we interact with. They don’t give a duck about IPs or emails, they can’t monetize those. So they will keep databases on all users and their connections and their interests all so they can show more appropriate ads. If they’re on the connected fediverse they’ll keep all that too, just in case. And any government can get this info if they ask for it.

#2 there is evidence of them wanting to do that. I’ll look up the thread on mastodon later (I’m on mobile rn).

#3 is a difficult one. I really don’t know why they even want this. I suspected it was to get active users on their initial timeline, but I guess that wasn’t that important to them after all. But there is a real chance of them stopping the growth of the fediverse or even minimizing the size and influence, simply to remove a competitor. Everything is better to them than having users calm down in a relaxing social media environment that is non toxic and could make them all obsolete and kill the whole social media industry’s MO