Debating "Dark Social": Where the Rest of the Internet Is

This conversation pursuant to this recent piece on “Dark Social” (that is, sharing via IM or chat or email or IDK, IRC?) is interesting. It started with a look at traffic to the Atlantic, where they found that “all the social networks that you know” were really on just “about 43.5 percent of our social traffic. On the other, you have this previously unmeasured darknet that’s delivering 56.5 percent of people to individual stories. This is not a niche phenomenon! It’s more than 2.5x Facebook’s impact on the site.” What do you think? TELL US ON A SOCIAL NETWORK SOMEWHERE IN SPACE.