https://ayende.com/blog/186147-A/making-money-from-open-source-software-how-we-do-it

https://staltz.com/software-below-the-poverty-line.html

https://blog.sentry.io/2016/10/24/building-an-open-source-service.html

https://journal.dedasys.com/2007/02/03/in-thrall-to-scarcity/

https://news.ycombinator.com/item?id=19123153

http://www.ianbicking.org/blog/2019/03/open-source-doesnt-make-money-by-design.html

https://news.ycombinator.com/item?id=19431444

https://a16z.com/2014/02/14/why-there-will-never-be-another-redhat-the-economics-of-open-source/

https://github.com/nayafia/lemonade-stand