If they reduce down to one meeting a week it should help to increase their attendance numbers, at least temporarily.
It's interesting that it talks about meetings in 1923 having sessions called testimonies and the article says
On Saturday, August 25, Brother Rutherford delivered the talk “Sheep and Goats,” in which he clearly identified the “sheep” as righteously disposed people who would live on a paradise earth. He also introduced the resolution “A Warning.” This resolution denounced Christendom and urged honesthearted ones to separate themselves from “Babylon the Great.” (Rev. 18:2, 4) Zealous Bible Students earthwide would later unite in distributing millions of copies of this resolution.
This may be a clue as to what is in those secret boxes they sent out to the Congregations to be opened on the first week of November.
Resolutions
There's nothing like a good resolution to stir up those obedient sheep.