You can stake SCC right now on the StakeCube platform. When it comes to SCC shared masternodes they fill very fast so its hard to get a slot but that is also running and has been for a while now. If you are talking about nodecube then yes that is also up and running and you can start hosting your SCC nodes right now either cold or hot nodes. Hot nodes are, the coins are stored on StakeCube and your rewards are sent to your StakeCube SCC wallet where as the cold node is where you control your coins and rewards are sent to your wallet. I hope this helps answer your question.