I think those same people I mentioned would argue that being mainstream is also not a project goal, nor is utilization by corporations at all.
I have to admit I think a lot of people with this sort of "death to capitalism" mindset simply won't get anywhere, because they literally don't want to. I guess that means they may eventually fade into obscurity.
But the majority of project leaders I have talked to all seem to follow this mindset... they're not interested in making money, and "this is not a popularity contest."
Yet when a fork inevitably emerges, they go nuclear. Reminds me of a quote I saw one time... "they don't want open source, they want to be the ONLY source."