There's a principle called Occam's Razor that says that the simplest explanation is usually the correct explanation.

The simplest explanation for a betting system not working on a Playtech roulette game is that the house has an advantage based on the odds of winning versus the payout odds.

I don't see any reason Playtech would design a roulette software that does anything other than randomly select one of the 38 numbers. The only reason to program it to do otherwise would be if the player had an advantage, or if a betting system worked. Since the player has a disadvantage, and betting system's don't work, I can't imagine they would have any reason to rig the software.

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Randy