I disagree, most celebrities were/are posting what may as well be their fart schedules. Why would anybody care the vacations or fancy meals or random musings of some guy famous for being in movies? Some people evidently do care (voyeurism, and they'd care just as much about his fart schedule) but the point is the such an account doesn't have a check mark because it posts relevant or interesting content but rather because the guy is famous for things completely unrelated to what he posts about. The checkmarks for celebrities had nothing to do with what they posted and everything to do with who they are.