To be fair to 50BTC, I just received a support answer from them:

Hello!

We're doing our best to restore the service, but unfortunately we can't provide you the exact date.

Our work on this case is constantly interrupted by a DDoS attack.

User's balance data was corrupted, please provide us your balance amount before the attack.

Thank you for your patience.





I answered them honestly, but unfortunately, I'm sure there are people who will take advantage of this situation. The thing is that if people do lie about their balances it will make it impossible for 50BTC to balance the books and start paying anyone.  I am pleasantly surprised that they answered me back!  Maybe they will fix the damage?