Bah I don't even use steam for mods I use the Nexus sites.Enderal will be available for free and playable as long as there is an installation of Skyrim via Steam. However, the installation and update process of Enderal are now done via Steam.
It's a total conversion mod for Skyrim no publisher can sell it without Bethesda's approval. There was talk about this team making their own game a few years back.Surprised no big publisher didn't take notice of this.