Yes by making it like a one-click Join from their other very popular platform "Instagram" and advertising it there.
That's (most probably) why threads is currently not available in the EU. Gatekeeper practices like this would be illegal with the Digital Markets Act. But honestly it would be very easy to get around this. Just make it possible to join without an Instagram account. So I guess there are more concerns from Meta to not fullfil EU Standards than just this.
Sooo I guess EU finally did a good job here.
I just want to make this clear I'm also anti-meta and that's why I want them to feel a need to open up for users to make it easier to switch platforms.
I would trust them as much as any other new instance of any other platform that joins the Fendiverse. That's my point.