Plainly stated, he doesn’t agree with the rules and does not wish to forfeit the model to be subject to 3D printing as the other creators have. While I’m inclined to agree with him, at the same time, clear as day, he has made his wishes to not make the models available, thus they cannot be used as per the rules of the contest… which still confuse me to some degree.
As such, even if I did enter these, I’d be disqualified for not providing a 3D model file for each mask. I personally don’t agree with this rule either, but I am doing my best to follow everything they tell me to.