If like me, you are lazy and just want a quick idea how many people have followed a link from your site, and you have the click count enabled in PT
you can add the following to admin/index.php
$sql = "SELECT sum(clicks) AS ClickCount FROM `feeds`";
database_querySelect($sql,$rows);
print "Total<b> ".$rows[0]["ClickCount"]." </b>Clicks to Merchants";This just gives a total sum of clicks