After the end of the first .hack games, the AI Aura became something of a god of The World and, honestly, of the internet more generally. This lead to something of a golden age for the world and I guess like, Networking generally. This lasted from 2010 to 2014 (Remember, current date is 2017)
However, in 2014, Aura vanished. It is unclear why. But CC corp, realizing the loss of Aura was causing problems, took measures to restore her