Thank you for this article. I am inspired by your consistency. 200 articles in 4 months is HUGE. If you have written about how much you earned from these, or have analysed the stats, please share a link.
Also, since you said tooting your own horn is good, I am going to write about my success. It is not much. I only started taking Medium seriously in mid-May, but one article crossed the $100 mark. Maybe I can write about it (not sure if that is a good idea though).