looking at their FAQ page again:
As mentioned previously, if you have the “Resubscribe” button and press it, right now, you won’t be asked to pay (it didn’t ask me), and your next billing date will be November, 29th, or auto-charge day for December 2019.
In a nutshell, Classic should only be truly an incentive for those who have never subscribed before. If that’s you, reading this now, this would be my link
Existing subscribers will seemingly be able to keep Classic going just by making sure their subscription is either active or paused, and stays that way.