I wonder exactly what kind of developer does Open Source developer mean?

We only develop open source There are more kinds than that, but there are people who dedicate their lives to open source, and there are people who contribute little by little.

Linus Torvalds, who created Linux, received a few weeks of shares from Red Hat in the early days, and it's said that he got very rich

And Lee Hee-seung, who created Netty, also said that the netty project went up as a sub-project at the Apache Foundation and worked at Red Hat.

Now, Richard Stallman is the central figure in the free software movement, where programs go beyond open source, and programs are free to anyone, and when I searched the Internet, I found that he made money from lectures, donations, and so on.

Anyway, open-source developers seem to be a comprehensive concept in various meanings of open-source development and contribution.