Champaign is, and has been for a while, a computer science nerd school. No surprise that a lot of graduates get hired in silicon valley. And also no surprise they don't care about football. Lot of them are Asian (East, Southeast, South), too.
Then for Cal fans, I could see it working backwards too. "I'm going to pay 3-4x face value of what my season tickets cost, to watch Cal play a team I don't care about, with no interesting travel destination, and it will cost me 1.5hrs drive each way?? Hard no"