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 PrepBootstrap.
Please verify your email address by clicking on the link below, or copying and opening it in a new browser: https://prepbootstrap.com/account/email-verification/c3034703c20b68c622b32ec9e6f84223
Note that this link will expire in 24 hours and you will have to request another one from your PrepBootstrap account section.