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!
Isn't the subscription box pretty much meaningless nowadays anyway? If you do intend on removing spam subs, then why not, while you're at it, fix them by looking at the definition of "subscription."