Is everyone running their own open source project?

Essentially, I suppose. I put most of my personal projects on GitHub because a) I believe in the open-source philosophy generally and b) sometimes they are helpful to others! For example, because I put SmilApple on GitHub, someone was able to adapt it to make this. And besides, it's a great way to distribute programs that you want other people to use, like my current project Chokistream, or when I made a fan-translation of a game. None of these are "serious" projects like a new framework or something, and all of them have very limited audiences, but if I'm coding them, I might as well publish them where someone else might be able to benefit from them. I also don't feel like they're important for my career, but they're important for their own sake and I would care if I lost them.