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!
What you are doing is plain wrong. How about give us a explanation of who are the Spammers and how you can tell who is a Spammer. Because I am real and I am not a Spammer.