I understand everyone who wants $$ for his time writing code, but this article makes no sense. Why would you release your code open source and then expect to g

I understand everyone who wants $$ for his time writing code, but this article makes no sense. Why would you release your code open source and then expect to get paid for it? Also if you are the author of such an important open source library and you can't get a paid job as a software dev than there just must be something off-putting about you.