The logic is a bit mystifying, in the same article you have "When you hop into Periscope, you see streams from all around the world. From an engagement perspective, this is fantastic." right next to "There where only about 12 viewers of this stream, meaning a quarter of users watching were there to do harm." On what planet of 6 billion people, is having two-billionths of the population tune in where most of them are…
Perhaps the point was people from all over the world are using it rather than the product being popular only in a single region of the world?
I'd say your logic is more misguided then mystifying.
(P.S. - The world population is closer to 7 billion)