Hi Paul,
I don't know how much the Fellowship is responsible for funding FSFE.
In 2015, the contribution of the Fellowship was about 40% of our finances. Sponsorship is difficult to say something about: the figure on the web pages is right, but it also includes sponsorship for specific activities. Still, the Fellowship does represent a significant part of our funding and is more important than corporate sponsorship.
worthwhile considering whether this perspective is too simplistic and that some people actually donate to delegate instead of participate.
I absolutely think you're right about that, and there are also many people who contribute in a volunteer capacity to the FSFE but who aren't financially supporting the organisation. So contributing financially is only one of the ways in which people support the FSFE, and it's not certain those who do so seek representation in the General Assembly.