I pretty much share this position. The premium content is primarily recruiting, and I'm not a recruiting junkie, so that stuff doesn't interest me (or at least doesn't interest me enough to pay for it).
I like the free board here because of the sense of Rutgers community and the discussion on multiple aspects of Rutgers athletics (as well as the off-topic discussions, especially in the off-season), and the input from a varied group of posters.
When the switch happened, I checked out the other board. But the format is so bad (especially on mobile), that it was almost unreadable. At first I split my time between both boards, and figured I would end up where there was the most traffic. And that ended up here. There is more traffic on this free board in one hour than there is on the other free board in one week. (The premium board on the other site seems to fare better than their free board, but I guess that is because people who pay for the premium content there suffer through the board design because they want to discuss the premium content. 80% of the threads on their premium board are about recruiting or other premium content, so there is still very little general discussion.)
They say they plan to revamp the board design over there. But even when that happens, I don't know how they get people to migrate from here to there. Unless Rivals does something (either through action or inaction) to drive posters away, I don't know if there is an incentive for people to leave this board to post more regularly on their board.