For an organisation that keeps on boasting that it is different from Christendom and it's "money grabbing ways" , I was always amazed at the large number of contribution boxes strategically positioned around the assembly grounds. Each box had a watcher to make sure that no-one would pinch it ( bizarrely , even when 2 boxes were side by side , they had to have 2 watchers keep an eye on them ). Although the literature is supposed to be "without charge" , the instruction was always given to put a contribution box in every queue leading up to the distribution points.
Like Blondie said , I also can see the WTBTS increasingly moving towards a virtual "tithe" system , with pledges etc. They must kick themselves that they didn't have the foresight to insists on 10% tithes like the Mormons and it is too late now for a "new thought" to be installed. They clearly are struggling to get enough money coming in ( even with asset sales) and need to finance their big building projects.