MailChimper PRO allows you to embed the forms directly into the content. It can be visible when the user reach the area where the shortcode has been included or you can set it to show immediately. This modern solution gives you the ability to get subscriptions easily about even all articles or posts on your website. Thanks for the highly customizable features, provides the option to customize the width, colors, sizes and even the alignments.
It is also possible to display the form with onClick event, like a popup.