I don't think that it ill work, as dice rolls are luck based, so there are no strategy at all, you just have to be lucky to win. Just because you tired it few times and won small amount, it doesn't mean that you will win that in future too. Used this high chance you earn tiny profit, but if you lose you lose a lot, and it takes many wins to win back what you lost, while sometimes you get 2 or even 3 loses in row.
That is indeed the fact as you wont be winning with a single trick for too long and it all depends on how lucky you are,there are times when you can win a couple of bitcoin in a short amount of period and then there are times when you loose the coins in a short amount of time and 92% chances are more risky according to me as more you play the chances of busting are more.
Many people use martingale strategy in dice games, and chance to lose there is 0.1% Or even less, depends on what bet gambler makes every roll. And point is, that people lose even with chance as low as that, so i'm not surprised at all that people can lose with 8% chance. If they think there are some kind of strategy they just should bet all of their bitcoins on 50/50 and they will see they won or not, this way they will save time