The page is implicitly weird, too; r/books, for instance, is public but actively participating in the protest by refusing to post for 48 hours. The protest isn't a public/private binary.

EDIT: Is this even a list of subreddits that "pledged to go private"? Looking at r/askscience, they never pledged to go private, just to go read-only, like r/books. So why are they and r/books even on this list?