Everyday, @TeamYouTube. Everyday...
(Their stock answer is you were never subscribed or don’t know how to click a button properly in the first place.) https://twitter.com/thatswiftturtle/status/986973950361194496 …
FWIW I suspect that if one were to subpoena their follow/unfollow logs, the transactions would not match up with the backend data. That is, I suspect the data is being changed in the database directly, bypassing the follow/unfollow interface. Unlikely someone has access to both.