Quite frankly, I'm amazed that in a forum that is full of:
"The refs were bought off!"
"He bet on the other team!"
"The game was FIXED!"
... that NO ONE has said that this was planned.
Really guys... stay consistent
This was planned, just like the Movie Awards with Eminem. This is MTV we are talking about.
As a result of it, you have a surge in traffic to MTV.com (traffic = advertising money), everyone is talking about their movie awards when they initially wouldn't be. MTV benefits.
Now Swift is going to go on every talk show where all the hosts are going to ask the same "What was going through your head!?!" question, people will start paying more attention to her career. Swift benefits.
As for Kanye... I don't really have a reason why he would do it. He's a gay fish, but a self-proclaimed "genius". Wouldn't a "genius" have realized the reprocussions of this move? Maybe he got paid to do it, and didn't realize the money wasn't worth the negative pub.