https://na.finalfantasyxiv.com/lodes...524a398b543355
Especially those players who are using false addresses because Square Enix doesn't allow addresses in your country to register, so you used a false address.
I don't think Square Enix will put out such a notice if they're not getting ready to do something about it. Probably a massive ban wave coming. I would hold off resubbing if your subscription is about to expire.
Square Enix isn't one to care about your circumstances. They probably won't be refunding your sub because you violated their ToS in the first place, and because your information is false anyways, even if you have used a credit card.
Why are they doing this after literally 8 years of service? Probably due to the congestion, so the first class players (i.e. players residing in countries where they officially provide the service) can get in. They have too many players now anyways.
In fact I would think it's a good idea to cancel recurring subs anyways just in case. Such is the realities of dealing with a Japanese company.