Actually, Unregistred User were not displayed in the List of Users to Mentioning. This is the Reason NOT to buy the Plugin because it is for me essential to Mentioning all Users.
You can see a Example of this feature here: https://wordpress.org/plugins/mention-comments-authors/
I think it is a keyfeature of Blogging, to comment without register a account. This makes a Discussion nice and easy. So the Feature to Mentioning (which is a great thing) should be accessible to all Users.
It would be great when this feature can be provided in the Add-on. What did you think?
