How do you track conversions from a landing page to a purchase on Envato?

Analytics is available just for Elite Author .
Update: Aaaa sorry you are elite . :grinning:

Here are informations, how to set this :
http://marketblog.envato.com/releases/new-feature-google-analytics-for-elite-authors/
http://marketblog.envato.com/wp-content/uploads/2013/08/Adding-Google-Analytics.pdf

Other topic about this subject:

It would be nice to tell us after campaign if you helped by Google Adwords. And if you had positive results. And if there are things that are not specified in the above thread.

I proposed your problem to "How to … " competition :