@Outlaw as a matter a fact i help organising them. Also at assemblies/conventions no person is asked for money on a individual basis. No collection plate is passed around. If someone would like to contribute its possible. That happens anonymous. No one knows who gave what or when... or if anyone gave anything or not.
So is it possible to run an organisation on air or water ? No ... unfortunately is is not. Money is needed, bills are there to be paid. So on an assembly a few short statements are made about the possibilities to contribute and where/how people can if they like. Not more not less.