BitRocket is only a skill game if multiple players are playing. If you are playing BitRocket as a single player, it is not possible to overcome the house edge. This is because 1% of games will instant bust (0x) and no bonuses will be awarded. However, all other games have a bonus pool equal to 1% of the amount wagered per player. BitRocket with multiple players does require skill due to the bonuses awarded, which are explained below.
The rules for the bonus cryptocurrency structure payouts are listed as follows: 1% of every player's bet is put into a bonus pool. If there are 4 players, each betting 400, 300, 200 and 100 respectively, creating a total bet of 1000 satoshis, there will be 10 satoshis in the bonus pot.
If the biggest player wins, they get the whole bonus pot. The site always works out the rate they would be getting if they had won. For example, a 400 satoshi bet that gives 10 satoshi bonus, or a 1/40th bonus per satoshi, becomes the rate for that game. MintDice then applies the same rate to whoever actually wins.
If the 100 satoshi player wins, they get 1/40th of 100, or 2.5 satoshis. That leaves 7.5 satoshis in the pot, which goes to the next best placing player(s). If the 200 satoshi player comes 2nd. They are due 1/40th of 200, or 5 satoshis. There are still 7.5 satoshis in the pot, so they will get the full 5 satoshis - the same result as if they had come in 1st place. And finally, if the 300 satoshi player comes 3rd they are due 7.5 satoshis (300/40), but there are only 2.5 satoshi left in the pot, so they win the remainder of the pot and that's it. There's no bonus left for any remaining players.
Bottom line: The more you bet, the better chance you have at taking the entire bonus pot.