Hm, I don't know much about common law, but I don't think this would apply if, say, an ML enthusiast trained a model from LLaMA2 outputs, made it freely available, then someone else commercialised it. The later user never caused the original developer to breach any contract, they simply profited from an existing breach.
That said, doing this inside one company or with subsiduaries probably wouldn't fly.
I assume GP was talking about a scenario in which you had not entered into a contract with Meta. E.g. if I just downloaded the weights from someone else.
That's... not really accurate. See the concept of tortious interference with a contract.