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!
So can users who get unsubbed from a channel get a notification? There are a few channels I haven’t watched in a few months, but I still want to support their content. I may get unsubbed from one of them without knowing.