Privacy is obviously nice, but the spam thing was the main reason I originally bought the service. That and security purposes. I use a different email for each service, similar to how passwords should be used. So I can just turn the thing off if someone won't stop emailing or it gets pwned. Unfortunately, I gave Trezor my real deal (primary address) with my named domain. Privacy.com (Privacy is a terrible company name, but a great service) inspired me to search out such a service.