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 SE Labs.
A registration using your email address has been made at https://selabs.uk. If you made that registration please confirm it by clicking on the following address:
https://selabs.uk/en/users/confirmation?hash=b17f8ccf13e8a9e311d1814ffd3c0c1b.
If you did not try to register please ignore this message.