I'm kind of split about this. Yes, Facebook done a lot of great Open Source in the past, and I'm sure they'll do more great Open Source in the future.
But it's really hard to see them in a positive light when they keep misleading people about Llama, and publish blog posts that say how important Open Source is etc etc, then refuse to actually release Llama as Open Source, refuse to elaborate on why they see it as Open Source while no one else does it and refuse to take a step back and understand how the FOSS community feels when they actively mislead people like this.
The weights are the "preferred form of the work for making modifications to it", to quote the GPL. The rest is just the infrastructure used to produce the work.
Where "open source" is misleading with Llama is that it's restricted to companies under a certain size and has restrictions for what you can and can't do with it. That kind of restriction undermines the freedoms promised by the phrase "open source", and it's concerning to me that people have gotten so fixating on weights vs data when there's a big gap in the freedoms offered on the weights.