Whether or not that's actually enforceable[0], and whether or not other companies will actually challenge Facebook legal over it, is a different question.
[0] AI might not be copyrightable. Under US law, copyright only accrues in creative works. The weights of an AI model are a compressed representation of training data. Compressing something isn't a creative process so it creates no additional copyright; so the only way one can gain ownership of the model weights is to own the training data that gets put into them. And most if not all AI companies are not making their own training data...