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.
Membership Emails
Below is a sample of the emails you can expect to receive when signed up to Top Ten SEO.
Welcome and thank you for registering at Top Ten SEO Tools
If you are the creator of the Top Ten SEO Tools account, please click your activation url: http://toptenseo.de/?route=verify&username=&code=7604d1868c418665cf90b582f90f6cf1
After account confirmation, You can log in by using your username and password by visiting our website.