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.
From my understanding this comes from a feud with EU privacy law because Facebook wants to train models on EU users data, but GDPR makes that complicated (see their letter at euneedsai.com). So they made this license change to "punish" the EU.
As far as I know, no one does that (https://ollama.com as an example of a platform that breaks Llama's terms and conditions) and Meta isn't enforcing it. But who knows, they might do so in the future.
Not sure how any sane person can claim Llama is Open Source after realizing these things.