He gets 39 million from the Donkeys next year no matter what, so he can sign a league veteran minimum deal and pocket over 40 million. He's got a big ego like all Qb's of his stature, so the chance to prove 'em all wrong and try and ramp up his HOF chances is more than enough reason for him to play more...I doubt Russ plays for a cheap contract. I really don't think he cares enough about football at this point to do it unless there's big time money in it for him.
The Raiders take him, he plays the Donkeys twice next year...