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If you sign up for their newsletter on substratum.org, they will send you updates. I believe the nodes will be running early in the coming year, but they will surely keep you posted. You can sign up to become a Beta tester and if they choose you, I'd say you'll also be in earlier for renting out your computer space. I think this is going to be HUUUGE, just imagine when teenagers find out they can earn money without ever lifting a finger lol.