An exception to what you're saying is Blender by the way, the early (open source) history is a bit sketchy beyond the €100,000 they raised to get the rights (in 2002, well before Kickstarter "crowdfunding"), but I always had the impression what they did right was focus on funding for full-time devs right from the start.
Blender in general is a great open source success story probably not told often enough, probably because 3D is something most of us never really do. It's probably worth examining what they did right in some more detail.