I was a GridIron Club member for several years, and got fed up with their poor communication and inability to make a website that could allow me to renew my membership. I dropped off for those reasons. Here I am 2 years later, and I still get all the emails from them (including this one).
Without being too harsh, I'm not impressed with the folks who develop the logistics with getting and retaining members. Also, I attended 2 of their tailgates (one road, one home), and the GLC as a whole wasn't too welcoming to new faces. Seemed a little cliquey. Kinda got that a 'who the hell is this guy' vibe going. But sometimes my bandanna does that to people.
Hope your GLC experience is better, if so, I'd be happy to rejoin.