I'm skeptical Alex has anything on Aristrocrat. A junky slot maker like Novomatic, plausible, but Aristocrat I just don't believe. Modern machines like Aristrocrat change the outcome of a game thousands, many millions, of times per second. A human being is not going to be a able to press a button with such pinpoint accuracy. Even if they could, I would still be skeptical. The big boys like Aristrocrat, I think, seed their RNG's with white noise, which is not a repeating cycle.
I can tell you for a fact this is true for several old Aristocrat cabinets. It's been going on for years before people figured out what they were doing.
Fun fact: I independently theorized the Russian teams knew the RNG algorithm a year ago before any of these stories broke.