How did "pikachujdc" know this was going to take place beforehand???
When I saw gladoscc make the first 500 BTC bet, I figured it was a one off, but then he came back and seemed to not be himself. His spelling and punctuation was off, and I figured he was probably a hacker who had taken over gladoscc's account. So I froze the funds and investigated.
He was able to PM me on the forums, sign a message with his GPG key, and another message with his vanity Bitcoin address. So I unfroze the funds and he continued betting big.
While the funds were frozen he was still able to chat in the Just-Dice chatroom, and that's where pikachu heard about the record-breaking bet he was planning to make.
Hope that clears it up, and sorry for getting it wrong, gladoscc. I'd just hate for you to lose 500 BTC to a hacker.
As the owner of Just-Dice, is it my responsibility to investigate like this? Do I even have the right to freeze player funds when I suspect their accounts have been compromised? I don't know... If he'd had google-authentication 2-factor protection turned on, it wouldn't have been an issue.