His agent, Eris Kismet, has 5 players on his books. Considering the others are Sinan Bolat, Mounir El Hamdaoui, Jordan Remacle and Domenico Bruzzese you can see why he might think Benteke is his meal ticket and getting a slice of a transfer fee / signing on bonus / big new wages is his only real chance of earning big money this summer.
I hope someone points out to Benteke that him making a move at this point would be far more beneficial (and much lower risk) to his agent than it would be to himself and so he might want to make this decision on his own.