1.) Our Starter plan includes Paid Members App branding. Your customers will see this on the login forms and emails are sent from noreply@paidmembersapp.com. This branding can be removed by upgrading now. You have the option to send emails from noreply@your-customer-website.com.
2.) After upgrading it looks like the image, below. You can upgrade here.
3.) Yes, you can easily customize your login and signup forms!