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!
Could you potentially also add it to where the people who are unsubscribed from channels are also messaged with what channels they were unsubbed from in case something happens and it wasn't a spam sub?