Auxilium is a ticket support system. It is not only for envato authors. If you want to use for non-envato customers or if you are not an envato author still you can use this support portal.
This portal is not depend on envato so, if you buy from codecanyon(envato) still you can use this for your own business.
If you are a freelencer or any other business owner who need tiketing system for their customer support hey all can buy this without hesitation.
All Envato related features are not present by default. They are added by the system automatically when you enter your Envato API key in settings.
So buttons like 'Import from Envato' on the Categories page, 'Login Using Envato' on index and login page, 'Request purchase code' and 'Supported section' in ticket page are only available when you have entered Envato API keys in settings.