Right, and when they hit FA, they can sign anywhere. The deal is basically is the Bombers want to re-sign him before the FA window, it costs them. The Argos are just trying to make it really expensive for the Bombers during their negotiating window before FA.
Same as it's going to cost if want to negotiate with Masoli, Arbuckle, etc before the FA window opens. You'll need to "pay" their club for that right.
Of course, it could be written into the agreement that if Collaros signs at anytime before such-and-such a date, the Argos are owed something but probably not.