I do find it a bit surprising. If I were them, I would be pumping those bad boys out. There is probably a small fortune to be made. The sculpts are lovely and I'm sure people would be willing to pay top dollar for them. I have no experience in the industry however, so I might be overlooking some logistical or practical limitations that could hinder one from doing so. Also, I have no idea what other things they have going on in their lives, so there is that too! That said, my gut instinct tells me that they are not maximizing what could be a great opportunity.
Just my personal opinion though!

I could very well be wrong or overlooking something.