title: Tracking PayPal recurring payments via GA Measurement Protocol
body: <p>I'm using GA Measurement Protocol to store ecommerce data (PayPal IPN) in Google Analytics.
  Everything is fine, except that I have no information about referral source(s), utm campaigns, all payments grouped like this:</p>
  
  <pre><code>Source / Medium    Campaign
  (direct) / (none)  (not set)
  </code></pre>
  
  <p>This is clearly not true and it causing problems better understanding our visitors, calculating ROI for campaigns, etc.</p>
  
  <p>The client ID is fetched from the tracker and is in the following format:</p>
  
  <pre><code>1653513770.1386941807
  </code></pre>
  
  <p>Does anyone have similar issues? How can I resolve this?</p>