As far as perks go. The only one I can come up with is the pre-public sales for concerts, and other sporting events (college football, soccer, pro-wrestling, etc). Not to mention, invites to some practices, draft parties, things of that nature.
If you're a Devil's season ticket holder, then you know about getting to know the people who sit around you, who become like a second family. Always having the same seat location. Not having to pay premium prices for games on Stubhub or the NFL ticket exchange. Guaranteed playoff tickets, etc.