That's going to be interesting for some, and especially those built on a house of cards.
...we’ll soon implement a new process to improve the accuracy of subscriber counts. It’s similar to existing ways we ensure that other site metrics, like views, are free of spam and abuse, and keep YouTube a fair playing field for everyone.
On June 16, we’re going to remove suspended accounts from all channels’ subscriber counts. This means some of you will notice a minor drop in your subscribers. To be clear, these are not active viewers, so you shouldn’t see any impact on your views or watch time.
From there, we’ll have an automated system in place that removes suspended accounts from subscriber counts as they occur.YouTube To Start Removing Suspended Accounts From Subscriber Counts [youtubecreator.blogspot.com]