Do you actually think not going to games is hurting Jerry? He sells tickets to corporations who then sell them to others. Why do you think half the stadium cheers for the other team? Home field advantage is lost because of this.
Also, not buying merchandise can have an effect but a small one. Jerry makes his money many different ways and he knows that if you don't buy tickets, someone the will, and the problem with that is, that someone may or may not be a fan. But he doesn't care. He says it's "all about the fans", but we know from his actions the past 29 years, it's not.
He has big bills to pay and the little guys aren't going to pay them.