I wish this were the case & I think that this would be fair because most fiat holders were only holding fiat by chance and would probably have been in coin if the timing were slightly different.
However I think they propose to set the conversion date once the exchange is up.
"With a balance of 1000 USD, after conversion you will receive 55% in BTC, LTC, ETH (at exchange rate on the day of conversion) and 450 USDET. By this principle all koins and fiates will be converted. "
If not based on value at time of closure, then it should at least be converted as [date of closure] + [date of opening] / 2. This way, both crypto and fiat holders are hedged against the volatility that followed the exchange closure.
Also, can anybody who reads Russian update us on the situation of US customers? Thanks!