I would expect the daily/monthly BTC withdrawals to be something like 10BTC/day and 50 BTC/month. Anyone with a large account will be stuck there for a long long time.
I am also predicting 10BTC per day. They are pretty much doing what an insolvent bank would do but without actually coming out and saying it. Prepared to be proven wrong on this but I feel very strongly because this is hurting Bitcoin and was entirely avoidable.
The simplest way to serve their intent is a % limit withdrawal over each balance. so they will screw everybody !
Withdraw fiat while you still can !