I think you should read the article including the documented patents herein before assuming that casinos wouldn't do such a thing. Afterall, these air-ball roulettes are classified as EGMs. The whole point is, it might not be illegal because of their classification but it looks like a roulette wheel while some of them are not, they're like slot machines with fixed payout rates. Using RNG's to randomize the outcome is not a problem but determining a number by RNG before or during ball release, certainly is. If after reading the article, you still have doubts, I would be very interested to discuss on the matter.
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