This does not appear to be true if you read the earlier "Activation" section. If you have an existing subscription, it pauses while the free period is active. After that free period, your existing subscription resumes. As I read it, there is no "auto-subscribe" after the free period ends -- you just revert back to whatever you had before (or nothing, if you weren't a subscriber before).
If I'm reading it wrong, let me know.
I think you are right. I'll edit my comment to point to this.
Even if they did let the free users continue using, and then preesnted them with invoices, those would mean nothing without a registered, up-to-date payment method on file.
I mean, pay this invoice ... or else what?
> I mean, pay this invoice ... or else what?
Or else they send it to collections.