Follow These Steps
1. Sign in into your disqus account.
2. Now visit Disqus Export link. And then click on the Export Comments button.
3. Within sometime you will receive a email with a link pointing to a .xml.gz file.
Download and extract this file. You will have a .xml file now.
4. Now use the XML to Text EMail Convertor to convert this xml file into a list of email address with a .txt file format.
5. Now sign in into mailchimp.
6. Visit your lists pages. And click on the down arrow of a list on which you want to add the new email address.
And then click on Import.
7. Now click on Import from a CSV or TXT File
8.Now upload the converted text file. And then click Upload List button.