Irrational Games are "winding down"; all but 15 staff laid off [edit: Gamasutra - Bioshock Infinite didn't sell enough]

[Soleron]

kumagawa said:

...

And yet the key people are staying while the rest go and remember the CoD studio's get a game out every two years while Irrational took 6 years for a single game and it's not exactly a GTA or Elder Scrolls in size to justify that development time.

This is the easiest way to clear out what is obviously a lot of dead wood.

So, you agree with me that it's shutting down because the game failed to achieve.