I am a disqus user and I have no recollection of seeing this email or feature. I am not saying it wasn't sent to me, but if it was, the title surely didn't explain what was really happening because I would be concerned.
I wouldn't be overly surprised if the title was not clear, or the text was not obvious. It like the ToS changes from your credit card company, you need to be a lawyer to decipher it!
I'm only a casual Disqus user, I've maybe commented using it a handful of times, so don't know what the email contained or said. I'm just going by what I've read on here.
