Nudge has the ability to accept an "override" URL and/or traffic source. This is useful for cases where the canonical URL is incorrect, the URL is incorrect, or the Nudge tracking JS is placed in an environment where it detects the incorrect code.
To work with this, we've made 3 extra flags available for the tracking JS. When you deploy the script
<script src="//cdn.ndg.io/your-tracking-code.js" async></script>
You now have the 3 GET parameters available:
url: Override the URL with this.