I am not aware of an article summarizing his greatest hits. Principally, he's a person who talks a lot and likes some mild conspiratorial thinking. From what I gather, he's also a liability for anyone who ever employed him in their marketing department, because he's only interested in furthering his own brand. He does make a lot of videos these days, so I guess you can decide for yourself if you like him and his style. :)
Holly brings three decades of invaluable experience in nonprofit management, having served as a consultant, director of development, executive director, and board member for numerous organizations. Notably, she founded the nonprofit organization Artists United, dedicated to empowering individual artists and fostering collaboration across artistic disciplines for the collective good. Additionally, Holly served as the Executive Director of the BioBricks Foundation, an international, open-source biotechnology nonprofit.
The rest of her merits seem reasonable for the position. The post also says she has a masters degree in education and a bachelors degree in English from Harvard. I have to assume that the GNOME Foundation put a lot of thought into this based on interviews and investigation that we're not publicly privy to, and it's not as simple as "GNOME is stupid and they hired a crackpot shaman off the street haha!" People can do great things at their job without adhering to your specific worldview in their personal life.
So you want software developers to spend less time building the software so they can run a nonprofit too? Do you think all the conferences, sites, fundraising, marketing, extensive help docs, bug processing, and community engagement is all something that can just be done on the side?
Just ask any software dev working st any of these foundations. They don't want to do any of the business-side work. Or, if they do, they certainly don't want to do it alone. If they were alone in it, they wouldn't have time to write code.
Developers don't necessarily make the best fundraisers, auditors, accountants, human resource managers, legal advisors, or any of a hundred other disciplines involved in running a large organisation.
This particular person seems to have extensive experience managing large non-profits and membership organisations; which is exactly what the GNOME Foundation is. There's no expectation that everyone on the board of directors will know how to cut code...