In your propush.me account you can track and optimize the traffic sources, exclude them if there are no conversions and include the most converting sources to your stats using the parameter Source ID. In order to do that you should pass the ID of the source.
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For example, your landing page URL looks like this:

To pass the information about your traffic sources to us, you need to add sourceid (for the example above) to the corresponding field in the dashboard.
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JS code will be changed accordingly:

You do not need to use a third-party tracker to track statistics for each traffic source you have, you can find out the data in your dashboard.