Board Thread:Questions and Answers/@comment-30799108-20161220044052/@comment-30121804-20161220050053

So far, nearly all the data (sprites, animations, voice lines, etc) had been recorded in the internet, so your only concern is to know where to find them. If you can read Japanese, there is a Japanese Website that contain even more detail about FGO than this Wiki. So you shouldn't worry too much about losing your favorite franchise.

However, seriously I don't know I will quit the game first or it will close first. In the worst case, the company broke and the game will be shaken for a short time, before a new company buy it and continues to giving birth for more Gacha.