I had not.  This is a little different from what I had mind.  Also, seeing how many people view my invites and how many people request invites doesn't really live up to the "powerful analytics" they promise.  I was thinking more along the lines of a product in which first-adopters sign up generally, and list their interests. Then as sites sign up, beta sign up pages are produced (ie. everything that is going on at prefinery) as well as bringing in some ringers who might be interested. Then you can gather feedback from participating members, and if they give feedback, we give them more betas to try.