According to statistics from Etherscan, Tether, the stablecoin issuer, locked three Ethereum addresses holding over $160 million in USDT. The three accounts will no longer be able to transfer funds. According to the Bloxy block explorer, Tether has blacklisted 563 addresses on the Ethereum blockchain since November 2017. Tether has previously stated that it collaborates with regulators on a regular basis to monitor questionable accounts.