Well, open source was created in order to make (some of) the ideas of the hippy free software movement more acceptable to businesses, so, I think you got that part backwards.
At the cost of losing the free software ideals, open source has gone mainstream, and nowadays a large fraction of the work that goes into big established open source projects is done by paid developers working for corporations. Thus, to a very large extent, open source IS businesses. They are making it in their image, to fit their needs.
I guess the lone hacker/activist has been sidelined, and others with more resources have taken over the show.