“Threads is deepening its ties to the fediverse, also known as the open social web, which powers services like X alternative Mastodon, Pixelfed, PeerTube, Flipboard and other apps. On Wednesday, Meta announced that users on Threads will be able to see fediverse replies on other posts besides their own. In addition, posts that originated through the Threads API, like those created via third-party apps and scheduling services, will now be syndicated to the fediverse. The latter had previously been announced via an in-app message informing users that API posts would be shared to the fediverse starting on August 28.”
What I think or what they “may” do is irrelevant regarding public data. What matters is sending a clear signal what you are and are not okay with.
Whether you actively participate in helping them get your data or not might not effectively matter in them acquiring it, but it may heavily impact the fine they get for it afterwards. You might be okay with them getting your data for free, but I’m not, sweet summer child.