&gt; tail &#x2F;var&#x2F;log&#x2F;nginx&#x2F;access_log | grep &#x27;your_landing_site&#x27; | grep &#x27;facebook&#x27; | wc -l<p>How about run something like this for an actual concrete number of visitors, rather than relying on JS tracking? That&#x27;s much more concrete evidence.