They fired the reddit employee that dealt with all the AMA's because she didn't want to start doing like scripted, corporate sponsorship AMAs. And apparently the people that run reddit have been doing really shitty in working with the default sub mods. (I haven't noticed any negative effects from anything though) So in protest, a bunch of subreddits went private. It's kind of like the whole OT thing here, except it actually matters because it's on a real website. People in charge are doing a shitty job, people that their shitty jobs effect are mad. It's a shame r/circlejerk is private, because that's what all of it is.