Found 2 биржи where Usual USD is traded for USDT. According to the data on 5 November the most optimal price to exchange USD0 for USDT is ₮1 for 1 Usual USD. This rate is fixed at Pancakeswap V3 (Ethereum) at the maximum trading volume of the pair USD0/USDT - 16.7 ths. USDT.
The maximum daily trading volume is observed in the USD0/FXUSD--2 trading pair at Curve (Ethereum) and reaches ₮ 25,769.03 (0.02% of the exchange's total trading volumes) at the price ₮ 1 per 1 USD0.