The NFL has played loosely with the "75 mile rule" in recent years. Viewing areas are now measured more or less by general proximity and not 75 miles from a certain stadium.
For example, a couple of years ago, the Bills wanted Syracuse included in their "home viewing area" and conveniently found a slice of land within 75 miles of RWS and "within" the Syracuse viewing area. Thus, Syracuse is now a Bills viewing area.
Of course, this doesn't mean the Bills, or any other team, may not trot out the "75 mile" decree when it sees fit. In the end, you will get the game(s) your "local" team wants you to see, sellout or not.