For the sole reason that it is a CN owned property.
You know, now that I've watched Energon again these past few days, I'm glad they paused for a while. The animation looks a little better, but they still have the same dub mistakes.
Brief correction for Friday. It is being discussed on the Toonami thread since it wasn't started here, but it's actually .Hack//DUSK (renamed .Hack//Legend of the Twilight here in the US) that will air along with season 2 of Cyborg 009 Friday nights/ Saturday mornings at 1 AM.