I have some good news for you my friend. If you look under your settings and go to Audience development, you can add your Ko-fi link and it will automatically be added to the end of every story your post. It is in Beta but hope it stays.

I do like some of the other ideas, but fear that Medium does not have the capacity to implement many of them. Considering they were not able to maintain and instead choose to deprecate the ability to write a story from within the app.