I would not be shocked if another open model eventually shakes out of Facebook (based on Zuckerberg's public remarks).

Which remarks? Could you share a link?

He said something to the effect of "I love open source and open models and we'll do open models when it makes sense and closed models when it makes sense" in a recent Q&A.

Given that his company has already released open models, I find it funny that, as you described it, his remark communicates absolutely nothing whatsoever. Not sure what the question was, but this was an artful non-answer.