Threads, Meta's new microblogging platform, is updating its terms to focus on data collection from "Third Party Users".
Threads new 'Supplemental Privacy Policy' (Instagram link) says they'll collect (from fediverse users interacting with Threads users):
Username
Profile Picture
IP Address
Name of Third Party Service
Posts from profile
Post interactions (Follow, Like, Reshare, Mentions)
From the linked article:
"Granted, these sound like basic table stakes for federation to work well within the Fediverse. Most Mastodon servers collect roughly about the same amount of data for basic features to work correctly. But again, Meta is first and foremost an advertising and data harvesting company..."
I personally migrated to toot.site, but any of the instances listed on fedipact.online aren't federating with threads if you don't wanna go on toot.site for whatever reason.