I do about 5€/month on an astrology app on the Play Store [1], and I did 50€ once on my SaaS astrology web app [2]. The rest of my web apps [3][4][5] give me 0

I do about 5€/month on an astrology app on the Play Store [1], and I did 50€ once on my SaaS astrology web app [2]. The rest of my web apps [3][4][5] give me 0 (zero) per month.. I'm now planning on starting a python development blog, and I hope I can sell some courses if I'm able to drive an audience. I teach CS (next year part-time) on a local college and I have some tutorials and lab exercises for my students (some of which I shared at the full-speed python ebook [6]).. Edit: forgot that the fine guys at educative.io send my a monthly payment of about ~100€ for the full-speed python course at their platform [7]. I guess I'm much better at coming up with programming tutorials than with business ideas.. Some day my luck will improve! :) [1] https://play.google.com/store/apps/details?id=com.flatangle.charts&hl=en_US&gl=US https://play.google.com/store/apps/details?id=com.flatangle.... [2] http://elements.flatangle.com/ http://elements.flatangle.com/ [3] http://mockrest.com/ http://mockrest.com/ [4] https://cronbeats.com/ https://cronbeats.com/ [5] http://mailaday.com/ http://mailaday.com/ [6] https://github.com/joaoventura/full-speed-python/ https://github.com/joaoventura/full-speed-python/ [7] https://www.educative.io/courses/full-speed-python https://www.educative.io/courses/full-speed-python