It is a spin that the Soc is using to get more hrs from the members. The numbers of those willing to Aux pioneer in Mar and April were falling when it was only 60 hrs. Then, magically the quota changed. There is also pressure on the Body of Elders to participate, too.
We've come a long way from the days of 75 hrs a month, and when you wanted to do it the following month the quota was 100 hrs. Of course that was the days of the "Lamp Book".
The soc has been creative with this new approach, but, like everything else it will eventually run out of steam. I give it less than 5 years.