This is an interesting story but would you be able to provide some proofs to us? Some people might have think that this is not good conversation but I think there's no harm on it if it happened 10 years ago, I'm pretty sure gambling sites already solved that exploit and managed to improve their security. I was curious what kind of exploit you've found and how would you be able to withdraw that money if you've made millions? I assume you also deposit a big amount and what kind of casino is that?
I think it came from third party casino games as those are the ones that are vulnerable from exploit.