It is all about control. Publishers are tossing literally hundreds of thousands of dollars in literature every month. How do I know this? Well, I am extrapolating so bear with me.
I went to the dump to drop off some yard waste. I had to drive through the garbage area to get to the recycle, compost area. As I am driving through my kid says, "Dad, check it out. A ton of JW stuff!" Well, lo and behold, there is a pile of old mags and tracts, newer ones mind you, almost two garbage cans full just dumped out next to a bunch of other trash. I thought it was a great visible metaphor.