Q: When a end user signs up. They receive a message that says Success! However, they don’t receive an email confirmation. The backend of wordpress user management area also doesn’t show any of their information including their email address, name, and etc after sign up. I’m not sure why, but can you please address this?
As it is explained in documentation:
This widget will show sign up form. All data provided through this widget, will be sent on your main email address.
So, this is a basic newsletter plugin and it only collects addresses of interested users. If you want something more, then you need MailChimp or FeedBurner widget. We never promoted this widget as a widget with premium options.
Email address that will be used for handling this can be set in The Cause Options -> About Us. As it is explained in theme documentation:
5) About Us
In this area you can set candidate biography or movement info which will be used in sidebar if you choose one of premade custom widgets. You can also set your contact details, social network profiles, location of office, etc…
NOTE: email set in this area will be used for contact form, newsletter sign up and event attendence application.