When you ask people to test it, you could take the email wall down when requests are made with a query-string var added to the link you post. Sure, some kind s

When you ask people to test it, you could take the email wall down when requests are made with a query-string var added to the link you post. Sure, some kind souls will sign up to give you the feedback, but I think you will get more feedback with lower friction to enter your site.