Why was the guide saying to go to the casino, if the casino did not have an exploit? confused
The weird thing about gamba in a single player game is that most of the time you could "cheat" (a.k.a. save scumming) so you will always win.
AND the fact that for some reason, in all of the slot machine minigame i have played, there is only 1 that have an algorithm to make you loose. Most will always give you a net profit, even if you loose a lot, to the point you could just put a macro or auto clicker to keep playing the slot machine, leave it, them go back an hour or two later and your money would double or triple in amount.