As an engineer I'm a bit puzzled that github was valuated 3 times less than linkedin. Yet I haven't done any real analysis, neither I know if business data of

As an engineer I'm a bit puzzled that github was valuated 3 times less than linkedin. Yet I haven't done any real analysis, neither I know if business data of X individuals is valued more than hosting Y projects, probably from an ad + data gathering perspective it makes some sense but still I'd love to hear a more in depth analysis on this