[eganist]

OP already mentioned that it adds additional hurdles for possible future tech giants to have to cross on their quest.

It's akin to a Great Filter, if such an analogy helps. If Meta's open models make a company's closed models uneconomical for others to consume, then the business case for those models is compromised and the odds of them growing to a size where they can compete with Meta in other ways is mitigated a bit.