Just chiming in that my teenage son bought 2 tickets to Rice for $20 each. Not some last-minute scalping deal either; he bought them right after the LA game. Section 1, so not great but not upper deck either. Say what you want about corner endzone seats but having 25% of the touchdowns happen right in front of you doesn't suck. He and a buddy were perfectly content to grab a Coke and enjoy the game. They were both in for about $30 total. You can catch a game like this any year. I've taken my kids to a cheap game just about every year. I'll splurge for a big game, OU, Rose Bowl, etc... but there are absolutely cheap ways to watch a game or two each season.
Years ago, I was a season ticket holder. I have no desire to attend more than about 1 game a year now. Too many people. There's really no kind of event where I want to spend that much time that close to that many people. It's still fun, but only about once a year. A whole season's worth would be a beating even if they were all $20 a ticket.