Would TNBW Free still be non-points group? If not, how should we post so that free members see our work?
Let me ask you this, have you received any reviews from free members?
I haven't received any reviews from free members, although I've given about a half dozen. I started as a free member on the old site and almost immediately upgraded when I saw that I needed to do so in order to post and get reviews.
However, when I first upgraded, I didn't understand the need to reciprocate to keep some of my preferred reviewers going with my book. I lost two important potential reviewers given the nature of book. (Unfortunately, I took that book down and replaced it with my current version, so the initial reviews/reviewer names are gone.)
Whatever you decide, be sure to give free members enough time, access, and how-to information to understand how the site works before they decide to leave. A three month trial ought to be enough, or, as you suggested, a requirement to read more than premium members in order to keep posting. I would definitely give them access to inline reviews, even if it's only for a short time, because they make the new site really shine.
Dirk