Apart from USC, students dont care about football in those school. USC is old alumni and fans from around Pasadena/South Pasadena (old money) who want to toot their horns and pretend USC is still relevant with a few legacy students to attend football games with their parents. UCLA, Stanford, Cal... Have you seen what ghost towns their stadiums are during a football game? It's seriously so embarrassing. Even when those schools have decent years their student fanbase is virtually no where to be found.

Engagement is so low with PAC 10 fans with teams not named Utah, Oregon, and Washington. That's about all the analysis you need to do to understand what is happening.