Did you know that the witnesses believe the Watchtower is symbolised in the revelations as their weapon of warfare?
I think for this reason, they have been willing for years to print as many millions as possible and throw them at the public like throwing mud at a wall, hoping some will stick.
I expect that this decision was made by the new body which looks after the financial matters of the org and not by the GB who (for the biblical reason) would probably not be so objective when looking at balance sheets.
One has to look at this decision in the same light as the decision to cut pioneer hours: it is purely statistical analysis that the number of magazines published and the number of hours spent in witnessing is extrememly (EXTREMELY - LOOK AT THE FIGURES) in-efficient.
The watchtower has to tighten it's belt, buckle up, streamline, get ready for the long haul, not presume it will come tomorrow. Only accountants could come up with this strategy, for if the GB suggested this action, they would not be "putting their trust in Jehovah".