Yes, it is, and I do both. I've written code that ships in Ubuntu (and Debian, and Red Hat, and Fedora, and FreeBSD, etc.), and I've worked on Open Source projects for over a dozen years. I believe that grants me a right to speak on the subject, particularly since I'm not advocating a position that benefits me in any way; it merely presents my opinion as an Open Source contributor of many years.
Yes, it is, and I do both. I've written code that ships in Ubuntu (and Debian, and Red Hat, and Fedora, and FreeBSD, etc.), and I've worked on Open Source projects for over a dozen years. I believe that grants me a right to speak on the subject, particularly since I'm not advocating a position that benefits me in any way; it merely presents my opinion as an Open Source contributor of many years.