Really great explanations from Matt. He captured some really subtle nuances. For example, the part about the delegated STEEM for these Steem spin-offs (D.tube, etc.) -- as i understand it, these spin-offs have powerful accounts of their own with a lot of Steem Power, and are going to use that Steem Power to upvote user content. As Matt noted in his talk, as long as your content is "not horrendous," you could be surprised at the economic potential... Makes me want to check out Zappl and other sites...