Been thinking about this myself. Google absolutely loves one of my sites (#1 out of 1m+ results) so this could be a killer.
This blog post makes me think that Let's Encrypt is maybe not quite ready for widespread deployment yet? I would imagine a browser generated security warning would probably be even more of a roadblcok, when compared to a Google warning...
https://letsencrypt.org/2016/08/05/l...y-mozilla.html
What company do people recommend for buying a certificate from, in the meantime?