> tail /var/log/nginx/access_log | grep 'your_landing_site' | grep 'facebook' | wc -l How about run something like this for an actual concrete number of visito

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