that's true it's just a matter of luck, honestly i tried that before i think multiple times already but i am not really lucky to this kind of games i still prefer crash and dice game whenever in playing in casino gambling sites.
I guess someone can get lucky after the first try, but others can't get lucky even after 1000 attempts. Nevertheless, slots have a little advantage over in-house(crash, dice) games because you need to wager only 2.5k BTC to get a BFG token.