Why does Google profit from HTTPS over HTTP?
Amazon.com (HTTP) redirects to (HTTPS), via a 301 - that's Permanent Redirection.
This also isn't Mozilla, but Chrome.
And honestly i don't even know where to begin, but you should look into HSTS, and the vulnerabilities that exist transitioning between the two modes[1],
as well as looking at the issues (data bleed, etc) that happen with a http+https web and mixed content.
Finally the bigger issue to ad rev is likely to be cross origin content rather than https.
and, er, semantically there's a gulf of difference between "Not Secure" and "Insecure".
Also, arguably, the shift to a https first web is what's helping us shine light into bad CAs and deeper audits that are finding the esoteric bugs -- so it's only a good thing, in the long term.
[1]: http://michael-coates.blogspot.com/2009/02/compromising-http...