I have used Bitbet.us occasionally for years and had 1.5 BTC in open bets on the site. Considering that the site has been down for days without any announcement, I am concerned that the owner chose to take the money and run.
However, I can confirm that none of my deposit transactions have yet been moved.
Oh, that's sad, never leave such amount into a site wallet, the probability of you be scammed is enormous, always transfer ASAP your Bitcoins to a desktop / hot wallet.
BTW, what's going on here? I see the site is down, is there another thread about bitbet.us? Also there is a new member account here, so everything is OK now?! Did you get your btc back?