The co-creator of Facebook's Librasays that once the blockchain-based digital currency is launched users' social media information & and financial data tied to the stablecoin & will not be connected in any way.Christian Catalini, the head economist at Calibra, the Facebook subsidiary in charge of the launch of Libra and its associatedonline digital wallet, said that from the beginning the plan for the cash-backed cryptocurrency was to profit from advertising and not the sale of private data.