This is what the dev said. In this post https://bitcointalk.org/index.php?topic=1026371.msg13127285#msg13127285

So! Yes, we lost 69.98% from our premine, but now, even if a hacker tries to send coins somewhere, network will not accept his transaction!

We believe that this is the right decision!
Because, we have kept all coins of our customers. Yes! All coins in the exchanges and on the wallets of our customers are still valid! Yes!

Now let's do simple math - We had 60M IEC premine - We divided this sum into two parts - 51M IEC (for our gold and silver reserve) - 9M IEC (as I said - for payments on ivugeo.eu, future investors, bounties, other servicies and iec atms).

After stealing our coins, we have only 9M IEC premine.

Currently mined 1 051 808 IEC  
▼▼▼
In that black day for us, the hacker sold to our customers 9 009 318 IEC
▼▼▼
In this case, our customers have 1 051 808 IEC + 9 009 318 IEC = 10 061 126 IEC

After all, we have only 9 000 000 IEC - I think this is a fair!