He pretty much just won a Super Bowl, not by himself of course but without him the Bengals are champs. Easy worth an extra $40 mil bonus for three more rolls
These kinds of things are very worrisome. The NFL is becoming more and more topheavy, and more players are getting raises on the same contract. I don't care how good a guy is, when he's under contract, the team needs to be able to feel confident that he's going on play under that contract and they have X amount of cap space to fill out the rest of the roster.