If someone had break the algorithm and be able to sync with the result of the slots, then he can deliberately increase and decrease his bet to minimize losses and maximize winnings. One example, if a player know that the next spin will trigger a bonus round and the bonus round will pay, then he can adjust his bet to maximum allowable and take the winnings.
Although mist slot games are closed source, I don't believe the algorithm or the formula used to determine the results is that complicated or hard to figure out. Some slot games even explain publicly how game results are being generated in the
info page. So, this is not really a problem because this information alone can't be usdd by the player to predict the results of the game. What you need to know is the random number for that particular session
I don't really know much about programming and much less about the different types of code or the algorithms of slots, but if I do know something, if there are factors that are very random, it's kind of hard to determine what the combination will be, and depending on the programming you can have many tools that are used for random things, that's why I say that the algorithm that the hacker can launch has to be much more difficult than that initial programming of a slot machine.
But that programming will not be so different from the ones in online casinos, the casinos that are the slots that are manipulated manually are under the equivalent programming of online casinos.