Easily insert a checkbox at the end of your blog’s comment forms so your viewers can double optin to a MailChimp or Aweber list of your choosing. Here are two fine working plugins you should give try.
Aweber Comment Optin
Aweber Comment Optin allows you to insert a checkbox at the end of your comment forms so your viewers can double optin to a Aweber list of your choosing.Install and activate it, then Visit Dashboard-> Settings-> Aweber Comment Optin and complete the OAuth authentication.
MailChimp Comment Optin
MailChimp Comment Optin allows you to insert a checkbox at the end of your comment forms so your viewers can double optin to a Aweber list of your choosing. Install and activate it, then visit Dashboard-> Settings-> MC Comment Optin and enter your MailChimp API key.