Cox, and others at MS in charge of PR and marketing, deliberately deceived the old fan base with misinformation ranging from inferring tings that were not technically true, tricking the old fans with imagery and sound to lead them intentionally to false conclusion, and at the worst outright lies.
Why? Because they realized if the fan base knew the truth of the project's true form they would have lost the support of the fans before tricking anyo9ne into buying it.
It has nothing to do with IGA. Most things don't anyway, but all the uninformed, misguided, popular-wanna-be kids seem to latch on to that to sound cool.