Interesting. This indicates that the door to door work is no longer effective and that witnesses are losing heart because when you think about it, the stands are more for the witnesses to reaffirm their separateness from the world rather than actively preaching/presenting the "good news".
The witnesses still feel they are dong something as service but don't have to actually engage.
Funny it used to be called the warning work. I'm glad they don't apply this method of warning in the Fire Dept!