It does cost them some, as the writers and editors and graphic artists etc....as well as the crews to print, pack, ship are housed and fed. A smaller crew means less costs, maybe pennies per mag, but the magnitude is large
Reducing the pages reduces the cost of paper, ink and machine wear and tear, electricity, packing materials - even if it were 2 pennies per edition for all of these, there is a substantial saving here too.
Finally cost of shipping materials, fuel and so on has also increased a lot in recent years.

There is a large saving to be had even for them, the printed material crunch is happening to all, even though they think that they are "not of this world" lol on them !

I want to end my seasons like I started them ...free!  ~~ Uncle Andy - 98yrs old 2012 ~~

What I believe now is that the WBT$ must be stopped! They have ruined lives and been responsible for the deaths of too many innocent people in the name of delusion._ PUNKOFNICE 2012

As to the existence of a "creator" I say we are all agnostics as a matter of epistemology, Whether you are an atheist, or the Pope. Some people claim to know, and that is fine for them. But why should I believe that they saw what they claim, or that they believe what they say they saw?  I saw nothing and they have shown me nothing _  SE7EN  2012

Because Jehovah's Witnesses believe as little in psychology as they do in philosophy, it tames or numbs the wilderness of the heart by closing valves of inquiry." _Barbara Grizzuti Harrison.