Found 2 биржи where Gamium is traded for USDT. According to the data on 9 February the most optimal price to exchange GMM for USDT is ₮0 for 1 Gamium. This rate is fixed at Gate.io at the maximum trading volume of the pair GMM/USDT - 10.2 ths. USDT.
The maximum daily trading volume is observed in the GMM/USDT trading pair at Gate.io and reaches ₮ 10,241.67 (0.00025% of the exchange's total trading volumes) at the price ₮ 0 per 1 GMM.