One view is that the majority of gamblers consistently devout a certain amount of money to put towards their favorite games. It makes sense that as BTC rises, that these casual players put the same fiat amount of their disposable income into btc for gambling purposes. This equates to anticipated less revenue for s.dice and would lead to a sell off on exchanges. As bitcoin gains in acceptance, more users may play s.dice, but the price may continue to go up long term due to demand. If this view is correct, s.dice could struggle to experience any substantial revenue growth despite a growing user base.
That would explain the variance, with ASIC it is about the network and mining as measured in bitcoin while S.Dice is different
Good observation thanks