I hope and wish they are just " Down for Maintenance " as they claim on error page, I'll give them 12 more hours before jumping to any such conclusion of they being goxxxed.
They were providing acceptable returns although a lil higher than what you get in banks . But can't trust feds, also the service they were providing falls in grey area so the feds can make it illegal.
Check the BTCjam forum thread, seems people logged into their account and it was empty.