This is very common in NYC. I know for a fact that around the Brooklyn Heights area and other surroundings I've seen the dubs with table full of Watchtower literature and I mean just like a news stand. I don't quite remember if this method was allow years ago but it does seem that it may be a desperate move to place as many literature as possible. Maybe this approach is a good way of putting more hours just by sitting and allowing the public see and served themselves with literature.
My take on this is that very soon all dubs will may have to implement this new method of witnessing. Right now, door to door solicitation in many of private dweeling as well as city own in my area is been banned. They are not allowing any groups of people to enter a building without first describing their intent. If it is for soliciting they are not allow in.
just my 2 cents