On your Authory page, people can subscribe to you via email with a single click. No registration required.
Btw, you won't be able to see the option to subscribe on your profile when you are logged in. You need to log out to see it like your readers do (or alternatively click the button "View your Authory page as visitor" that you can find in the sidebar menu).
Btw, check our helpful tips for getting more subscribers.