To me, the biggest sign of a "hoarder" is that they have more animals than they can (or at least do) take care of properly. It might be 50 dogs or cats, but it might also be just a few. I bet there are some well respected dog &/or cat breeders out there that have that many animals, but I don't think they are hoarders. And I agree that it is most likely some sort of disease. There are people that hoard other things, such as stacks of newspapers that they will never look at or use, but they feel some sort of need to keep them.

Similarly, the biggest sign of a "puppy mill" (or kitten mill, or corn snake mill, etc) is when the animals are bred with the primary concern being the number of animals produced. Puppies that come out of puppy mills often do not look very much like the breed that they are supposed to represent, and may have inherited genetic problems. It seems like it would be possible to produce a large number of snakes while still being careful about the quality, not breeding snakes with problems such as kinks, and even keeping track of which ones are het for what. So I would not consider that a snake mill.