Do product owners really work in open source projects where developers aren't getting paid? I know personally, as an developer and an open source contributor,

Do product owners really work in open source projects where developers aren't getting paid? I know personally, as an developer and an open source contributor, I'm going to work on something which either scratches my own itch or something which interests me. I certainly wouldn't be spending my own time working on the roadmap of a product owner if it doesn't fall into one of the two categories anyways.