I want to
feature-request what I said in a comment to this post.
Could followers who did not commit be invited to the private beta directly as committed users will be? (without needing the invitation of a committed user)
Meta Stack Exchange is a question and answer site for meta-discussion of the Stack Exchange family of Q&A websites. It only takes a minute to sign up.Sign up to join this community
We will have a very limited invitation system during the private beta -- so committers can invite a few folks of their choosing to the site during the period that the private beta runs.
But really, the goal is to get out of private beta ASAP.
(however, yes, it is possible in theory that some sites could reach private beta and fail to exit, because they're not generating enough activity..)
This may require more careful consideration than it seems at first glance.
One of the reasons to limit people to 3 commitments is to avoid having beta participants spreading themselves too thin - it's worthwhile limiting their participation so they focus more closely on the sites they believe they can contribute the most.
There are ways to get into the beta without committing, but making it trivial or easy to do so may actually be counterproductive.