Disposable Temporary E-Mail Address

While musing about reputation and trustworthyness of information I came across http://www.trustme.com/. They provide you with a disposable temporary email address that is valid for 15 minutes. This seems quite usefull if some RP requires to know your email address before it serves out some information like e.g. a whitepaper. Now you can receive that one-time-link from the RP, use it for email-verified-login, download that paper and forget the RP again.

But why is trustme.com doing this? Altruism?
Can I trust Steve Cannon, 5699 Kanan Road #115, Agoura Hills, CA 91301, US not to read my temporary email? What is his reputation? Probably his address is outdated anyway?!