When they are short of material, they dig up an old interpretation, dust it off and shine some new light on it.
What else would they fill the millions of books and magazines they have printed, with? It is not just prophecy interpretations that get refurbished and sold as new.
They have the 'new understanding' magic trick on anything from voting or blood policy. Then there is the reinventing their history wheeze in books like The Divine Purpose.
For a group of frustrated old men they are amazing.