Earlier quoted context omitted.
It's not at all clear whether weights are copyrightable.
I'm pretty sure they are. If not copyrightable, then at least the database law should apply. One can easily make the case in front of a judge that the situation is similar to databases: the value of weights lies in the amount of work needed to gather the training data, thus weights should be considered a sort of crystallization of a database.
at this point, their not even complaining about it must mean that they accept the data is public now