User blog comment:Cshannon/Introducing Wikia Stars/@comment-4765619-20130110235836/@comment-24024274-20130111000141

Well, speaking from my personal experience, I was emailed and asked if I would like to be part of the program. You can also request to join, or nominate someone else to be part of the program. So, judging by that, it seems like it's a user's choice to me. Of course, I could be wrong, but that's just what I've gathered from the information I've seen and been given.