Highly doubt you were "scammed" 100 BTC, just a few weeks ago I deposited 80 BTC and withdrew 90 BTC after Stunna filled up the hot wallet to cover my withdraw. Did you have any PD bots installed? Try scanning your computer for malware

This looks like people trying to accuse PrimeDice of scamming, maybe a rival dice site? Anyone can easily deposit 100+ BTC and withdraw it and cry scam.