Comment by simonrobb

It doesn't really cost anything to open source something though. These are all projects which are developed for a reason: the commercial version might be prohibitively expensive at Uber scale, or not technically capable of operating at Uber scale, or just plain doesn't exist yet. At that point you can engage with the tech community and offer it as OSS (not to mention make your engineers happy), or you can keep it to yourself and eventually lose that opportunity to somebody else.