I'm afraid fair DICE GAME (gambling site) doesn't exist, I mean they may be put " Probably Fair" but they are just sugarcoating it so that many players will think that it's safe to play Dice game on them, but the truth is, they are not. Gambling sites would never let you off the hook that easy when you won big amount of money, you might be lucky for one day, but the revenge will be worst.
There's only two answers, it's fair or not, if you believe it's not fair, they are cheating and we don't want a gambling site that cheats.. but look at how progressive the gambling site now, even those who started solely on dice, they grew overtime, that is because people believe they are fair and they understand the house edge as well.