A funny quirk of social media is that despite having more followers on Twitter than Facebook (4,100 vs. 2,400 at the moment), and even with Facebook algorithms that seem to reduce page views for any post with commercial intent (e.g. product links) so you can pay to boost it, The Map Room consistently gets twice as much traffic from Facebook as it does from Twitter. Go figure. (Google+ traffic is 10 percent Facebook’s; Tumblr’s is a rounding error.)