At present, the only such feature is character image support. Inconnu used to have rudimentary support for displaying character images, but this is being phased out for a more streamlined and more powerful system that removes the need for you to host the images yourself.
Users who already had an image set may keep that image without becoming a patron. Note, however, that you will no longer be able to edit that image, only delete it, and you will not be able to upload additional images without becoming a patron. Thanks for your support!