shade and i sent out a round of feedback emails saturday (thanks shade!) to 124 users who had started the game in march but hadn't logged in since april 5th or so. we have only gotten one reply now but hopefully we will get more and you can view the responses here.
i have also created a spreadsheet just to keep track of the mailings. this data can be viewed here.
we hope to get somewhere between 5 & 10 percent response rate but more would be nice. we also sent out a test message last week to some vets just to make sure the mailer worked after ns fixed it. it seemed to work fine, even though it confused some of the community! ; )