The Infusionsoft integration with Intrakr is offered through a separate service plan which a user can sign up for here: http://intrakr.com/features/infusionsoft.
As an affiliate, you should be aware of this distinction. If you wish to market to members of your audience that use or are interested in Infusionsoft, be sure to generate a link that takes users to the Infusionsoft Integration page:
Infusionsoft Integration Features
For a full list of features, please visit the app page in the Infusionsoft Marketplace: http://marketplace.infusionsoft.com/app/intrakr