USDT0 news today centers on expanded Stellar DeFi utility and a scheduled exchange migration on Optimism. On September 23, RedStone announced the launch of SEP-40 data feeds for USDT0 and earnUSDC on Stellar, while MGBX said it would suspend deposits and withdrawals for the old Optimism USDT contract on September 24 as it prepares to migrate support to USDT0.