Initially FF14 had a user base of approximately 60-100k (I know its a huge range, but that all the more shows how far its fallen). And since its release the only money its made has been off the actual physical purchase of the software, which more than likely barely broke even if made any money at all given development costs. SE put a big gamble on 14 and so far its failed, miserably, so far earning no gains at all now more than six months after release.

I've also read that FF13 was, despite some profit, not nearly the money maker they were hoping for it to be.

Currently I'm more than willing to wager that Final Fantasy XI is SE's primary source of income at the moment outside of its successful products from its now child company Eidos. As long as they're making money on FFXI it'll never disappear.