One thing we recently started looking at is outbound traffic, i.e. links that people click within our website/app. We're going to publish some results (and joint forces) soon, but I wanted to share here because I feel outbound links are something usually ignored. Yet they can contribute to a significant part of the total Internet traffic.

So, upgrading outbound links from http to https (where possible) can be another way to contribute to achieving 100% of the web traffic encrypted.