that's the best assumption, yes. i believe USDT is can still be withdrawn. USDT is currently trading at 10:1 to USD. that tells us how other wex users are pricing in the chance of recovery: 10%.

they don't have much incentive to come back even if they had the funds. they've lost the trust of users. and now that binance has frozen accounts believed to be tied to wex cold storage wallets, it looks like they don't have the funds anyway.