I don’t see them blocking accounts. What would it achieve? Their goal is to monetize you. By taking you out of the equation, they can’t monetize you anymore. You’ll probably keep doing what you were doing anonymously or with a new account, so blocking you won’t reduce costs either.
On the other hand, Google is collecting a lot of data. Maybe now they aren’t using it very effectively, but sooner or later they might find a key to make YouTube Premium a viable option even for someone like you. By using YouTube and other Google services, you are providing key fragments.