So apparantely someone made a post on the JP forums and made a lodestone crawler to check active players over the last 4 months, they found that around 25% have stopped logging on, even once in the last 4 month period from when they started scanning. Thats a large loss during free mode when they are still updating the game, that means those 25% didn't even bother to log in after updates to check stuff out.

http://ffxiv.zam.com/forum.html?foru...7781898&page=1

Link to the original JP post in that topic.