What you're saying is that instead of converting the USD balances to crypto directly, they will instead give people USD tokens, and BTC-e will list the remaining crypto on the exchange. The only way that model makes sense is that the crypto listed by BTC-e would only be redeemable for USD, and not BTE. The USD could not be used on the exchange for anything but redeeming from BTC-e themselves
I think the plan is, that the btce token is only tradable with USD/EUR/RUR (based on the statement that they say the token can be "freely traded but only maximum at $1 face value"). They stated that everybody gets 45% btce token based on their currency value (today's value as far as I understand), regardless if crypto or fiat holder. And I doubt that there will be tether for each crypto. Only USDT/EURT/RURT, maybe even only USDT.
So, fiat holders have fiat + btce tokens and with the fiat, they can buy crypto at the exchange from anybody who is willing to sell crypto, including btce themselves, or buy, of course, more btce tokens. The crypto holders have their coins + btce tokens and can either withdraw their coins (limits, verification) or trade against other crypto or fiat. And the btce tokens can only be traded with fiat.
How else would it be possible to pay back remaining 45%? If there is no fiat or new crypto in the system, btce token cannot be bought, thus no 45% debt re-payment. Very simple. Also, if btce tokens can be traded with crypto it will result that crypto holders will make big bucks whereas fiat holders will be double fucked. So, from the
55% for everybody POV it makes sense btce tokens can only be traded with fiat.