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The same way wikipedia or the linux foundation keeps running I suppose.

The Linux Foundation is more like a Chamber of Commerce: https://www.linuxfoundation.org/about/board-members/

Sorry! I was wrong. Linux is much older than the Linux foundation, though that has no effect on my larger point of course.

It's a non-profit, so probably the same way as the wikimedia foundation, the apache foundation, the mozilla foundation, etc.