> Is this really a blockchain? It’s not open. It’s not decentralized! > While the initial mechanism by which organizations can run a node and become a member of the Libra Association, is definitely not as open as, say Bitcoin, where anyone can participate in the consensus algorithm, the Libra Blockchain is absolutely designed to be open.

They skip the first question: Libra is not a block chain. It uses Merkel tree accumulators for updating the state of the database, so it's definately not a block chain, it's just marketed as one.