So it is confirmed by a GF mod on discord:
GF is actively playing around with blacklisting random IP masks which results in ALOT of players are now banned from connecting to the authorization server and cannot play anymore.
It seems like they are happy as long as some people can log in = less complaints, while others are shafted and ditched. The mod also mentioned that if you are one of those people you have to contact support (which = 2-3 days on waiting for a reply).
The handling of this couldn't be more disgusting and disrespectful towards actual paying customers.
Are you kidding me? Rofl!