Releasing twice a day makes sense, if you're not the most visited website in the world. There's something about Facebook's approach to things like that that screams, "immature startup" Facebook is an adult now and should act rightfully so, it has stakeholders and investors to appease and if something breaks for even 5 minutes the share price could tumble having a roll on effect and everyone knows Facebook can't really afford to suffer any more share price drops.
