Thanks for the link to your post. I read with great interest. These coins are ERC20 tokens. They are not blockchains. Here is the sequel to this article https://steemit.com/blockchain/@sharonomics/sustainability-of-a-blockchain-xcix and the original is published here: https://medium.com/@ali.raheman/sustainability-of-a-blockchain-6645136f9966
RE: Is There A Blockchain For Social Good?(XCVIII)