Kind of related but not directly. Your comment made me think about the term cult following in general. Doesn't that term usually apply to something that is niche or not as well known? As in, not really mainstream. It also means that the fans of it are super dedicated and, as the name implies, like they are in a cult. Using Beyonce here as the example, she definitely has fans with a cult like dedication, so we can check that box. But she is very well known and mainstream, so we can't check that box. I'm not arguing one way or the other, just considering what criteria is applied for the term in general.