My only current concern is a trademark infringement lawsuit brought by Valve on behalf of their platform Steam(classified by Wikipedia as a 'digital distribution platform developed by Valve Corporation, which offers digital rights management (DRM), multiplayer gaming, video streaming and social networking services.')

I'm not an expert, but Steemit and Steam are pretty close, and the video streaming and social networking services could make this a tough situation. Any trademark lawyers out there who can clarify this?