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!
Well better keep an eye on my subscriptions. I already find that YouTube drops the ones that I don't watch as often. If I hit subscribe then I want to stay subscribed.