I made $35 in 4 days selling my ebook on Medium

Last month I wrote a blog post on "10 Startup business models" which got popular on medium.
https://bit.ly/3TqLqAA

Then I spent a week writing an e-book on "31 Startup business models" and sold 7 copies till now.
https://minimba.gumroad.com/l/31-startup-business-model

Feel free to ask anything. I am happy to help all my brothers here 😊