>>280102437They're also probably trying to convince him to stick around. Elusive is obviously ending soonish and Matsui will be thinking about what he wants to do next. And a proven reliable mangaka would be a great asset for a magazine that's been struggling to get new series off the ground.
Makes me think he really has expressed interest in going to a seinen magazine like some anons have speculated and that WSJ is hoping that if they give him enough freedom he won't.