Sektenkult, my understanding is that if you set up a non profit entity (in Australia) then any profits and monies cannot be syphoned off to an ordinary Company where monies can be held, owned, used or distributed to shareholders by the Directors as they see fit within their own constitution. America is fairly similar but I stand to be corrected.
If the non profit entity is forced or needed to dissolve, the money and assets would need to be transferred to another non profit, it's in their constitution which is a requirement to allow them to be a non profit and receive all the tax benefits. Whereas, with an ordinary, private company the Directors dictate ownership and control.
The properties in Brooklyn were owned by the Watchtower, as a non profit organization. Who knows how much money they are putting into ordinary Company structures. It's interesting that they have a seperate donation box for their proposed media compound and it's an easy way to legally divert donations into a Comany which is not a non profit.