The newest version of
CyberSEO Pro (9.005) is integrated with
FIFU ("Featured Image From URL") - a freeware plugin for WordPress.
The FIFU plugin allows you to make featured images (aka post thumbnails) from hotlinked pictures located on 3rd-party websites. So when the "Use FIFU" option is enabled in the CyberSEO Pro feed settings, the attached featured images won't be stored locally free a megaton of disk space on your server.
Also it may be used to avoid some copyright-related issues. For example, if you use CyberSEO Pro to import Chaturbate feeds to your site
like this, you may get a headache with the internal Chaturbate content handling regulations that allow you to display images of their livecam models at your site, but those images may not be hosted at your server.
This particular Chaturbate issue is one of those cases when FIFU plugin comes to rescue.