@ev My two cents: I would be willing to pay a small subscription fee for the ability to publish (and comment) to Medium. It is beautiful platform to use. It also has a good audience.
From a content marketing perspective, I have a client that has measurably grown her business through people following her Medium blogs and eventually using her services. She would probably pay a bit more because it directly leads to business. So, perhaps there is a tiered subscription model for publishers.
I am sure you will find the right model. I salute your patience and faith that you will eventually find it. You have made a wise decision to terminate distracting activity.