You underestimate Notre Dame. There is a reason the Big10 added a Notre Dame clause to its media deals. Notre Dame, joining the Big would be a huge windfall in revenue for the Big and they know it. Again, no other school/program was specifically named in the Big's media deals, and those deals were signed prior to USC, Washington, Oregon moving to the Big10.
If it was just a matter of ND enhancing viewership, wouldn't you think they would have then included Washington, USC, Oregon, etc. in that clause? Clearly adding west coast markets would be of greater value than a small private university in the midwest, yet there not ND is named in the media deals.