Meta has several billion active users across their platforms. 30M is nothing to them.

Also don’t forget that we’re talking about a microblog, so it will inherently generate a large amount of individual posts, much more so than e.g Instagram. The quality is however likely very low initially and a lot of users are probably just trying out the current talk of the day.

I do suspect that Threads will probably grow to a few hundred million users before the end of the year; anything less would probably be regarded as a colossal failure for Meta.