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!
How many subs will T-series end up with then? Considering they rarely get views close to 500k, they have over 70 million subs, they definitely have a large amount of sub bots to sort out.