i'd imagine that FTP games might not be able to consistently pull in money (at least in theory they wouldn't) but i'm not sure what percentage of games like world of warcraft's revenue comes from recurring debit rather than game cards or what-not

DCUO is a surprisingly good game considering a lack of extensive end-game (but it is a new game so w/e)

From what I've heard and seen - FF14 is not worth paying money for at this stage. Pretty much everything is going to change anyway.