Most open-source software is written by people who are paid by large corporations.

For example, Everybody on the Open-JDK program is on the Oracle payroll.

Yes, that's right. Large Corporations are the biggest contributors to open-source software. I know that might burst a bubble of people thinking we all sit in mommies basement coding the best software around for free, the reality is different. Microsoft, for example, is one of the biggest contributors to the Open Source community on the planet.