Sigh. Well, attempted to stick foot in mouth and waiting now for my moderated comment to be passed through the queue:
In sum, PG links to Seth Godin's blog about Kickstarter as a writer. He sort of skims along the surface in this post, but a previous one brought up the true fans concept.
True fans background reading:
http://www.novelr.com/2009/04/28/rethinking-1000-true-fans (post at novelr)