Drearyweather quoted fro KM August 81
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The Society is interested in knowing how much time is spent in proclaiming God’s truths to those who are not dedicated, baptized Witnesses. So time spent in shepherding or other calls made on those who are not strong spiritually and those who have not associated for some time should not be counted if the individual is a baptized Witness. It is a labor of love."
According to this, it would mean that witnessing was not considered a labor of love, which goes along with the idea that it is a works based religion.
But why does the Organization want to know how many hours JWs put into preaching but not know how much time their Elders spend on their various duries? They have no way of knowing what a burden they create for many Elders and their families.