You can tie private information, such as your telephone number (for SMS) and various emails to your account that you can associate with alerts on various reminders you set up.

It's bad practice to not use a secure login, because anyone who is sniffing HTTP traffic can see your Uptime Robot username and password in plaintext.

This might not be that bad for this website, but keep in mind how many people use the same email/password for other services, or their email.