Great idea! So true...I did something similar to this and got a TON of comments...I should check how many...but something in the same ballpark of 200 I think.
Thanks for providing statistics of active users. I think that's SO useful to see and I wish EVERYONE knew this, and I wish there was some kind of disclaimer that popped up with your exact words when new users are about to sign up.
That way they are more aware of how things work I guess.