It's just not in their interest to be a normal part of the fediverse. It's in their interest to compete with mastodon. Mastodon is not competitive because it doesn't have billions of dollars in its budget.

EEE works the way it always has. Add features not present in Mastodon that only work on threads. People want those features and join threads, Mastodon users are missing out. Long time Mastodon users create a second Threads account so they can interact properly with their friends, and eventually abandon their old Mastodon account.

I used Mastodon but the same applies to firefish etc, any fediverse technology that will interact with threads. It probably won't impact Lemmy.