I think Khan/his people have realized he hasn't got much longer to make the big paydays. If he can't get Floyd or Manny, he'll never make as much, no matter how many times he fights, who trains him, what have you. On top of that, there's a good chance he's on the decline, and could easily lose to just about anyone that would be seen as a legitimate path to Floyd imo. Why else has he done dick all since losing to Garcia, he couldn't have been terribly invested in becoming a better fighter or proving anything. Can't blame Khan for wanting to cash out I guess, I'm just surprised how many people see this as a good fight.