Such as?
[edit] from the inactive account policy page[1]:
> A Google Account is considered active even if it has not been used within a 2-year period if one or more of these applies:
> - Your Google Account was used to make a purchase of a Google product, app, service, or subscription that is current or ongoing.
> - Your Google Account contains a gift card with a monetary balance.
> - Your Google Account owns a published application or game with ongoing, active subscriptions or active financial transactions associated with them. This might be a Google Account that owns an App on the Google Play store.
> - Your Google Account manages an active minor account with Family Link. Your Google Account has been used to purchase a digital item, for example, a book or movie.
A Google Account with YouTube channels, videos or comments
I should dial up One support to ask if this is really an exception or a hallucination.
EDIT: it appears that the support tech was able to validate the email I received and also deny that the above exemption applies. So, the email is a lie; possibly deleted from the policy very quickly after sending the email, or mistakenly included in it, or perhaps not-so-mistakenly. It appears that there are no exemptions for YouTube users.
It took the One support tech so, so, so many words to answer a "yes/no" question, though. Wow, 19 minutes on the chat.
Google's inactivity policy has multiple exemptions for people with certain things in their accounts, and I reviewed this policy change to conclude that I safely meet several exemptions, and my account will never be sanctioned for inactivity.
Lock me up, boys!