Anomalies

My site gets minimal views. Since adding the crossposring to social media sites, I get a few more visits when I post from people occasionally clicking through. And by minimal, I'm talking 1 or 2 visits a day, average. Yesterday, with no posts in over a week, I got 40 visits. One old post, in particular, got 15 views. What the hell is going on? I wonder if Google Anylitics has fixed their referrer spam issue, so would it be helpful to try to see where the traffic is suddenly from? This also happened a few months back. Strange...