its wierd on your site there are 2 guys betting 50k-60k and always winning!
If they bet on 1.05x or similar multiplier, they'll almost always win ... and in the highest rollers sections are only winners, but you don't see the losses generated on the way
If many people are betting, there is always chance to find few very lucky and few very unlucky people (with many bets, statistically the chance to something "interesting", like huge win streak or huge lose streak occurring is then quite high)