Aeria Won't do it. I've been with Aeria Games aka AGE (for Short) since 2006 early 2007 and they have never had advertising at all. From Shaiya, to Twelve Sky 1 and 2, they don't do much advertising. And I know alot of people from other MMORPGs loves the freebies, But Aeria won't do anything so much as to give 5 ap per person if you want friends to play.
If this happened, I'd be having bigger AP freebies than what I purchase in AP towards Aeria. WHICH in case they don't use the money for upgrading the server -_-