That's the (for me) interesting part but there are no signs of any of that on the website.
Probably if I register everything will be explained to me, but let me know what I'm registering for before I do it out of blind faith.
That said, if you do register, you can click your email account to modify how many request a page must receive for you to be alerted.
You probably should offer a bit more information. After all, you're targeting this at technical users, the barrier for entry doesn't have to be that low. Particularly since the service you're offering is "trust me to redirect your users with javascript whenever your site messes up."
I also agree I need to add more information. The javascript isn't redirecting at all though - just dynamically loading the page in the static error page.