The cynic in me wants to ask "What makes you think his departure was because of an anti-commercialisation position?"
My take (probably just as wrong as everybody's else take) is that he saw the huge commercialisation potential and realised that he could make even more money by having a larger stake, which he got when he started his own venture.
I looked and I didn't get an answer. hence my comment.
To clarify, we know what he said his reason was, we don't know if that really was his reason.
When people leave they very rarely voice the actual reason for leaving; the reason they give is designed to make them look as good as possible for any future employer or venture.
So they lost the plot on the altruistic mission within months of setting up shop, and now are just a pawn in a bigger game between other companies.