just a quick update, users have been unable to withdrawal their BTCs from all exchanges involved for over a week now. this might be the biggest scam in crypto in a long time (easily over 1 billion reais in lost funds - about $250mm).
We will know this Wednesday (when they said they will enable withdrawals again).
But are you sure about these numbers? R$ 1 bi sounds like a lot, even for them. Ive never seen conclusive numbers anywhere.