I just randomly picked a contribution from an external party. The commit that made it into mainline has an author set to the person that contributed the code originally and a committer set to one of the 'signal.org' members. I'm confused why people would have a problem with how they chose to manage their code if the original attribution is not lost in the process. I'm fairly certain the Linux codebase is managed similarly.

Edit: adding links I forgot https://github.com/signalapp/Signal-Android/pull/10219 https://github.com/signalapp/Signal-Android/commit/dda51bf36...