Hi. Sorry I am having problems with the medium app right now which is causing me some issues with responding to you easily.
When writers add one of your stories it can be beneficial as other writers can then see what you also write - thereby increasing traffic to your page.
As to CFDs, well even after a year I am still trying to get them! I have had 11 but can’t find any reason as to how they get chosen, other than levels of interest.

Regards
Jonathan