An example is provided below using the Bitcoin Blockchain since it is ACTUALLY open and transparent. Mining is the process by which coins are earned. In a recent presentation, Ruja Ignatova told people that in October 2016, existing members will be able to double their coins. The first is a simple recruitment-driven pyramid scheme, backed with a residual binary compensation structure. One clap, two clap, three clap, forty? By clapping more or less, you can signal to us which stories really stand out. Never miss a story from Block by Block, when you sign up for Medium.