That's just not true.
They found 5 teams willing to pay him. 49ers will not pay him so they are not an option for an extension, so no he would not stay there to win because it's about GETTING PAID AND WINNING
He can play 1 year and go get paid where he wants or commit to the next 4+ year somewhere and get paid.
He wants to play for Steelers where he feels he gets both.
What they offer 49ers has ZERO bearing on if they get him if he says he's not signing an extension, which is what he has said so far.
From the Pats end they are not giving him Jefferson money just to get him, that'd be dumb so the cap space is also irrelevant at this point as Cleveland, Pitt and NE can all pay him what he said he wanted.