It takes away the ability to know what it does though, which is also often considered an important aspect. By not publishing details on how to train the model, there's no way to know if they have included intentional misbehavior in the training. If they'd provide everything needed to train your own model, you could ensure that it's not by choosing your own data using the same methodology.

IMO it should be considered freeware, and only partially open. It's like releasing an open source program with a part of it delivered as a binary.