Extremely anodyne — given that the author has maintained FreeDOS for longer than I've been alive, I was hoping for slightly more interesting ideas than "have a website and be nice to people." Not that I disagree with his advice!
That said, Hall does offer good and sensible advice to keep the community together and civil.
Sometimes there's a lot of value in reiterating core concepts.
Maybe doubly so if they're validated by his long experience in the OSS world.
I think I would pretty a suspicious of a blog akin to “Linus Torvlads wants this website banned - build an enthusiastic and productive OSS community in just one week with this one neat trick.”