-Expanded playoff means he will have a much easier path in the PAC12.
-Boulder has plenty of money to keep him around if he wins.
The most significant factor IMO:
-Colorado has been beat down long enough that they don't have the massive contingent of vocal donors and administrators that want to micromanage the program. Not a lot of top programs that would come after Deion can offer that. He can run the program however he wants. Any other big time program will have strings attached to their offer.