This is an addition to the fact that BYU has there own TV station on campus that reaches 55 million homes. I'm guess those are mostly Mormon homes. Texas is also starting their own station. How long before Texas goes it alone? That's why I said Notre Dame will never join a conference when others are going the way they went.
Notre Dame does have more of a built-in base, as 25% of the country is Catholic, while 1.7% are Mormons. Both have a nationwide audience.