For those that were involved, it's largely in part to the nature of the RP itself. It was an incredible ride. Az's demeanor and thorough attention to detail, not to mention his devotion to his creation, sparked, fueled, and fully powered the remainder. I guarantee you, I speak for all of us when saying that. For those that haven't participated, I imagine, as some have mentioned, there were those that had been watching the stories unfold and wanted to jump in but weren't able for one reason or another, those who've heard or witnessed Az's legendary prowess, and, of course, those who simply saw "Zombies" and immediately wanted to sign on.

*shrug*