Yeah, horses for courses - whatever works!they sweat cause the cardboard is pulling it out. that is exactly how it works. cardboard is a million miles away from the fridge method, unless you are putting the box in the fridge lol.
there's nothing wrong with using it if you are facing high ambient humidity. it's how you get a proper hang in if you have a steady 70% or greater ambient rh. ambient rh is the atmospheric rh outdoor.