As a WebinarNinja Host, you can search for a subscriber of yours and get in touch with them directly.
Step 1: Click My Subscribers from the left menu.
Step 2: Look for the subscriber you'd like to send a message to or type their name in the Search users field as shown below and click Search.
Step 3: Once you've found the subscriber you're looking for, click Send Message and your local email app will open which you can use to send a message.
Your subscriber will then get your message as an email.