Hypos are those snakes that have a reduction of black in their coloration. The word "hypomelanism" means literally "under black," referring to the reducing of the melanin levels shown. The same greek word "hypo" is used in the name "hypodermic," which describes those needles that go "under the skin."
Therefore, I am not certain what benefit a hypo snow would produce. A reduced black effect on an animal that has no black? I know that it may very well reduce the width of the markings on the animal that would have been black on a normally colored specimen, but is that really something to seek? Maybe for some, but I doubt I'd be much interested.
Darin