I believe one of their goals is to crowd source medical information and possibly sell the results. Right now they have a "23 and We" research program where you can voluntarily opt in. Even if you don't when you go on their site they try to get you to answer questions about yourself from time to time. I have never answered them and they seem very innocuous such as is your earwax wet?. I am not sure if they dig deeper if you answer those questions in future questions