I get that, but I don't understand why it supports a 501(6) in this case[1].
Just because others have abused it doesn’t mean you should give up on it. Even if it's only about sending the right signal, that still matters.
Or is this about brutal honesty and they are saying bluntly: We're not a charity, so don't expect us to act like one in the first place.
If it is that, then why would anyone support them apart from their sponsoring organizations?
EDIT: Reading the whole thing carefully, I think they are going for an exclusive club. I genuinely wish them well, but to me it looks like a quite quixotic endeavour.
[1] There are many cases where a 501(6) makes sense. I'm strictly arguing the "Handmade Software Foundation" case here. Otherwise it gets complicated quickly.