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So "are sportsbooks & casinos spying on us"? Is there anonymity in the crypto-gambling world?
With money, people with skills, AI, and other tools all this is possible... So are we lying to ourselves when we think we are anonymous on the internet and gamble anonymously?
We are not lying to ourselves, in my opinion. It is possible, even to this day, to be anonymous on the internet and gamble anonymously, but it requires to get out of one's way in order to do so.
To begin with, I would not go for centralized casinos, not even those which are unregulated ones, if I was seeking to keep my identity secret while I gamble, registered or not any centralized entity will have access to your IP at the very minimum.
If I wanted to gamble anonymously, I would try to seek for smart contracts which are easily auditable and have enough liquidity blocked in them for me to wager whatever my gambling budget is, using a fresh new Ethereum wallet with a fresh new address, it would be pretty much 100% anonymous. Though, most gamblers cannot even audit a smart contract by themselves, so it would be a matter of trust.
Perhaps, it is better to stick to reliable and regulated casinos if we don't have to end up losing money to shady smart contracts and "decentralized" casinos.