I've been doing radio broadcasting of Raider football games for 20 years. I've never had anyone tell me they stayed home to listen to the radio instead of going to the game. But I have had numerous people tell me that their sick, etc. mom or dad could listen to the game and keep up with their beloved Raiders.
No doubt, some have stayed home when the weather was too hot or stormy or whatever. They may have even listened to the game on the radio. But those would have stayed home either way.
Radio hypes the game and the team. not just on game night, but throughout the rest of the year as well.
just my .02