Spreaker supports using Podtrac measurement. You can read the Spreaker help article here:
https://help.spreaker.com/en/articles/4877816-how-to-add-a-third-party-prefix-to-your-rss-feed
Here are the steps to follow:
Login to your Spreaker account
Navigate to the CMS
Access the RSS Customization section and select Manual
Scroll to the bottom of the page to where it reads “Tracking URL Prefix (i.e., Podtrac)”
Enter the Podtrac prefix: https://dts.podtrac.com/redirect.mp3/
Click Save