On August 1st, according to on-chain data, an address labeled as "Justin Sun" just transferred 2 million USDT to the Curve founder's address.
Earlier today, it was reported that the Curve founder had already repaid a total of 5.14 million FRAX. The 5 million USDT used for debt repayment seems to have been transferred from an external OTC address, where the off-marke t price may have been around $0.4 per token.