Some of the videos that Soft White Underbelly creates are demonetized, or as YouTube puts it, found to not be suitable for all advertisers.
Creating content on YouTube has been my full-time job for more than five years. There is a HUGE difference between a channel being kicked out of the Partner Program and videos being 'demonetized.' (Namely, that in the latter case, all of your other videos, past and future, can still earn revenue.)
Honestly, this just seems like the guy is trying to encourage people to pay for his "members only" content. I don't blame him for that, but afactual alarmist titles are not the right way to help him along.
YouTube's policies regarding advertiser friendliness are annoying, but they are mostly clear — and as far as I know, they have not substantively changed recently.