Thing is they've made it no secret that most of the game's funds go directly towards funding other projects by Square Enix. If I remember correctly the only 'pot' SE doesn't touch from FFXIV is the Mog Station sales. Everything you buy there allegedly goes back into the game, and it's the only service they've confirmed that with.
Also, you guys do realize most companies have to submit financial reports right?
Edgar has a few filings for SE, and
Edinet has their 2018 financial filings up currently, though it's all in Japanese. (Edinet might make your browser freak out just as a heads up. There are filings on
Kaijinet as well, which is a bit more secure.) I'm not sure if anyone actually wants to dig through all of it but to say people can't find out about SE's expenses isn't true. At a certain size most companies are expected to submit financial reports to various government bodies. Only thing I'm shaky on, as I need to parse through the data myself, is how much the Japanese government requires they file. I've only dealt hands on with American financial statements.
Edit:
They also have their earnings releases up on their official site that goes back further.