Update Here’s an explanation offered by Eyal in the comments. I think most, though not all, commenters thought this sounded like a reasonable explanation.
For the past few months, Facebook has been implementing a policy of removing all accounts (i.e. one that you have to send a “friend request” to) that do not belong to individual (i.e. real) people, and having all causes, fan sites, groups, etc moved to “pages” (i.e. one that you click “like” on).
This is not something specifically targeted at fringe leftists, but a general policy, and I have seen it mentioned on numerous occasions (which is the reason I know this little bit of trivia in the first place).