BlockFi, the cryptocurrency lending service, is expanding into trading with an unusual, zero-fee model.
Source: https://www.coindesk.com/crypto-lender-blockfi-rolls-out-zero-fee-trading-for-bitcoin-ether-gusd
Crypto Lender BlockFi Rolls Out Zero-Fee Trading for Bitcoin, Ether, GUSD
December 5, 2019
CoinDesk
