I don't understand this section. >What’s so special about this site? They made one mistake. They opened some of their analytics statistics in the period 2014-2

I don't understand this section. >What’s so special about this site? They made one mistake. They opened some of their analytics statistics in the period 2014-2015, probably not something they intended to do. Does the author mean they made available their stats for the period of 2014-2015? The last sentence seems to imply it was a mistake? I'm not sure how the author got access to the page view data.