Track RSS views via a pixel in the content

functions.php

<?php
function filter_the_content_rss($content){

  if ($_SERVER['REQUEST_URI'] == "/feed"){
    $url = get_permalink($post);
    $additional_text = '<img width=1 height=1 src="/ga_proxy_track.gif?page='.urlencode($url).'" />';
    return $content.$additional_text;
  }
  return $content
}
add_filter('the_content_feed', 'filter_the_content_rss', 10, 1);

Track RSS views via a pixel in the content

    # --- RSS TRACKING
    location ~ /ga_proxy_track\.gif {
        set $mainDomain 'frandroid.com';
        set $cid $cookie__ga_cid;
        if ($cid = '') {
            #set $cid "$request_id"; # only nginx 1.2.7
            set $cid "$pid-$date_local";
        }
        add_header Set-Cookie "_ga_cid=$cid; path=/; domain=.$mainDomain";
        set $uip "$remote_addr"; #x_forwarded_for
        rewrite ^ /collect?v=1&dl=$arg_page&dh=$host&tid=UA-5414263-24&cid=$cid&uip=$uip&t=pageview break;
        proxy_redirect     off;
        proxy_pass http://www.google-analytics.com;
    }