Here's a simple lottery game that could be easily verified by anyone.
Create an npub / website where you can bet on red or black.
When a new bitcoin block comes in, mod (%) the hash value by 2.
If the value is 0 = black, 1 = red.
If black wins, they win reds' pot. And vice versa.
Anyone could verify if cheating took place by doing the incredibly simple block height hash % 2.
You could follow this example to make the full game of roulette with other odds (including house wins).
The real question is legality.
When it comes to legality the trick is making sure no human is using the infrastructure.
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I don’t know what these words mean together.
That it’s a game played only by AIs lol