I agree with you, I don't find anywhere on the website where they say what algorithm they use to generate the dice roll number... 
So I don't understand how the players can check if the roll number is right or not. Thus, the game is maybe fair, but currently it isn't provably fair.
Yes, most of the game especially if it is a gambling platform would not be fair unless if it is online your betting with someone else that is online too and that would get you high percentage of winning 50/50%.So I don't understand how the players can check if the roll number is right or not. Thus, the game is maybe fair, but currently it isn't provably fair.
However, there are games that will let you win depending on your strategy and the demand for that game. If there are lot of players that made some losses then playing it would be at great advantage for one.could.have higher chances of winning. Betting games gives you 40/60% chance of winning and if there are losses in the previous players had made then probably you can have the higher chance of winning and that is only based on my presumption.
This is how I play I let other loss the games they play then I bet after them and it works as i can win confidently in the betting games.