This site did not show evidence of storing passwords in plaintext.
This site does allow secured connections (https)
This site did show a clear way to unsubscribe from their emails
This site does verify your email address.
Below is a sample of the emails you can expect to receive when signed up to ads.
This message and its contents may contain confidential information and its non-authorised use is prohibited by law. If you are not the intended recipient of this email, please advise the sender of the fact using the same, or other, means and delete this message and its contents from your system without copying, forwarding or revealing the contents of the message to any other person.