When a user signs up to subscribe their email gets added to a database. A username and password is also generated, however an email is never sent out to the user. Therefore they are unaware of their username and password and when they go to submit a comment, they are unable to do so with their email address, because the system says the email address is already used. Also there is no way for the user to retrieve their username and password from the system. The only thing it is good for is capturing emails. Otherwise it is a major nuisance.