Most of the 16 accounts with negative BTC balances have no corresponding BTC deposit/withdrawal history. I was hoping to find some evidence of the transaction malleability exploit there.
There are no transaction logs after Nov 2013. It is possible the transactions you are looking for are the redacted ones.
I was looking at the btc_xfer_report, which as I previously mentioned, has transactions dating all the way up to Feb 19.
The btc_xfer_report shows withdrawals occurring well after the Feb 7 BTC withdrawal suspension. There are 1360 withdrawals dated Feb 10 or later, involving 315 wallet ids, totaling 15541 BTC.
Many of these are paired with deposits to other wallet ids, so this suggests that the xfers document internal non-blockchain transfers as well.
I pursued this line of investigation a bit further: All withdrawals after Feb 8 are paired with a deposit to another wallet id, so they all appear to be internal transfers. In other words, if there were external BTC withdrawals allowed for "special" users, they aren't in the btc_xfer_report list.
There were a net 1295 BTC deposited on or after Feb 8, in 2666 transactions. Most were for fractional amounts, but as an example, there were 32 1 BTC deposits, and 3 10 BTC deposits... and the largest was a deposit of 420.
