Thats a kelly criterion, basically it depends on the house on wether if they want to increase or decrease the maximum profit. Corrected some math of yours, it should be
1 x House Edge x Bankroll
It could be either 0.5x ; 1x ; 1.5x or 2x if they house are willing to take up some risk in order to lure in whale to gamble
But how is Just-dice able to set their max profit so high?
The number I see there:
Site invested: 554,737.47504713
Max profit: 136,569.72
