This is an extension for Intercom Subscription Base Plugin. You will need the plugin to be installed on your website to make this work.
Thank you for your interest in the Contact Form 7 Add On for our Intercom Subscription plugin.
This extension or add on extends the functionality of the base plugin to adopt it for Contact Form 7 forms. This can be used to subscribe your users who submit Contact Form 7 forms with their email address on the form.