Launchpad / Upstart / Unity / Mir
Launchpad is free-software by name only, and Canonical actively discourage you to setup your own instance.
Upstart hasn't been widely adopted outside of Ubuntu, and has been replaced by the technically superior systemd.
Unity has been extremely unpopular from a user-experience point of view, and now we have Mir. So past history isn't filling me with confidence. Their philosophy seems to be "patch first, ask questions later".
I'm amazed how Canonical has the resources to keep branching out so much while producing a distribution every 6 months. I was under the impression they weren't yet making a profit.