So this is charting pageviews not sessions. Did those increase as well? I ask because we saw a net uptick in pageviews but sessions were much lower. The issue turned out to be Facebook code on our pages destroying page load times and we assume leading a rise in refreshes.

Most news sites are littered with beacons so I imagine they had similar issues (times 10).

As a small retailer, we probably ended up losing 15-20% of our sales that day.