Looks like a useful service. Just a word of warning, your SSL certificate is not trusted by Chrome and possibly some other browsers. You have to install Intermediate certificates to make it work for everyone.
Green lock + "The identity of this website has been verified by COMODO RSA Domain Validation Secure Server CA but does not have public audit records."
No warnings.
Also a comodo certificate.
I had recently installed new certs, but failed to point it to the ssl-bundled cert and instead it was just the main cert without the intermediates.
Things are happier now: https://www.ssllabs.com/ssltest/analyze.html?d=diff.io&hideR... "A+"