title: Rewrite rule not filtering referral spam correctly (anymore)
body: <p>I've added below rewrite rule to my web.config. It has worked perfectly, blocking all mentioned referral spam sites.
  However, today suddenly I noticed that <code>social-buttons.com</code> popped up in my Google Analytics.
  How is this possible with the rule I have defined below?</p>
  
  <pre><code>    &lt;rule name="abort referer spam requests" stopProcessing="true"&gt;
        &lt;match url=".*" /&gt;
        &lt;conditions&gt;
           &lt;add input="{HTTP_REFERER}" pattern="(semalt\.com)|(buttons\-for\-website\.com)|(simple\-share\-buttons\.com)|(darodar\.com)|(social\-buttons\.com)" /&gt;
        &lt;/conditions&gt;
        &lt;action type="AbortRequest" /&gt;
      &lt;/rule&gt;
  </code></pre>