I said the same thing. When the topic first came up on here, I was saying no way it would work. Supported with logic and common sense. It really does work and even better too. It makes absolutely no sense why and how.. I guess when the freezer door closes. I guess it turns into Narnia in there or something. hehehe
Mr. Scientist ring in here...
It works the exact same way as freezer burn. When you leave delicious meat uncovered in the freezer, the ever so important moisture in the meat goes directly from solid to gas, skipping the liquid stage in between. This process is called 'Sublimation' or freezer burn.
It results in shitty tasting, dried out food, but it also results in properly cured buds that the arch nemesis' of THC (moisture and heat) can't get at!
When moisture leaves the bud it turns the non-psychoactive, acidic compound THCa, into the non-acidic, psychoactive compound THC. Heat causes THCa and THC to break down into different Cannabinoids, so the freezer is a natually great place at preventing that from happening!