Heads up, Creators: On Dec 13-14 you may see a noticeable decrease in your sub count as we remove spam subscriptions. If spam is removed, you'll see a YouTube Studio alert: https://goo.gl/qGDBvX This should help give you confidence that the subs you do have are real fans!
70 Mil from T-Series. All from exactly the same IP addresses. Those certain addresses in ANY amount of time? When YT was down for example? The YouTube community remembers.