re: Malcolm Butler is in New Orleans,

That's not quite how it works.

We'd still owe whatever we agree to pay him. The Jets get a discount on whatever they owe him up to that $6 mil (based on what the new team pays him).

Revis only gets $6 mil unless someone pays him more than that.

So in order for him to play he'll need to be offered more than $6 mil (otherwise he sits on the couch and collects $6 mil without doing any work) or he'll wait until late in the year and go to a team that can win a ring (no reason to sign for cheap early in the year).

Unless he just REALLY wants to play and doesn't care to just sit and collect a check. In that case you might get him cheap.