Two sorts of volunteering opportunities were available for the Olympics, the first being for those who will generally support as volunteers working at events, seating people, escorting athletes for drug testing, doing IT work, etc. The second group were for Performance Volunteers - musicians, actors, dancers and others wanting to take part in the opening/closing ceremonies and other events. It looks to me like these document relate to the latter ie payment was never in questions as the individuals or groups VOLUNTEERED to do something.