Charles – yes, trying to imagine a sort of Venn diagram of volunteers (of various sorts), members and other supporters is an interesting exercise I think.  The microgrant attraction doesn’t have to be a benefit we’d anticipate all members using though, but it might be a draw for a particular sort of volunteer (whether that’s the sort of volunteer the movement is interested in, and that sort of motivation is ok I guess are separate issues).  That’s  why I don’t think trying to classify the sorts of activities people might be engaged in depending on their differing statuses within the organisation is going to help here.  I’m struggling to think about how to make this distinction but at the moment the page is closer to describing how people see their relationship to the organisation (members – want to show support for…, might be interested in internals of Wikimedia. Volunteers – might be interested in particular projects, or whatever), what people actually do is less focus than the area or support they want to express…if that makes sense.