Use it for support, billing, a correction to something on this site, or a security issue you have found.
From inside a page
The Feedback button at the edge of most pages sends a note straight to us. Use it to report something that looks wrong while you are looking at it.
Your data
To have your account and everything stored for it deleted, email the address above from the address you signed up with. What Growth Radar can read, and how to remove it yourself, is on the security page and in the privacy policy.