I've posted this data before in this thread, but over the past few seasons, Oregon has been the ratings juggernaut of the conference (even over USC):
College football TV ratings for the 2024 regular season, bowls, College Football Playoff and National Championship.
www.sportsmediawatch.com
College football television ratings for the 2021 regular season, bowls, College Football Playoff and National Championship.
www.sportsmediawatch.com
Washington does well, but not as well as Oregon. Those numbers aren't verified by "SicEmGoBearsCoverUpThemRapesAndMurders365.com", so take it with a grain of salt.
In looking for my post containing that information, I stumbled upon that "Fanbase Size Estimate" that the media consultant put together, and it's clear why the B12 would love to get their hands on the Four Corner schools:
View attachment 59384
if that data is to be believed, ASU has a bigger fanbase than any B12 school, and all 4 schools would rank in the top half of a new "Big16"