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They are Asian, and less affluent and less big gamblers than the other friends who went. They get comped mailings for free rooms, we don't. Seems like they go after Asian names.

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Now it does sound like someone in their marketing dept. or someone they use for marketing advice has sold them on the idea of target mailing to Asians.

Evidently someone(s) in the casino has ok'd spending the money for the list(s), mailing, etc. It may be a test mailing or, it may be a continuing effort because the test(s) were successful.

At first it may sound like stereotying, but there are thousands of mailing lists available and you can, literally, pick any target you want. People innocently/naively provide publicly available info about themselves everyday in the damnedest ways. Companies in the mailing list business compile this info and sell it.

Goodnews posted his personal experience. What he says is also true in other parts of the world that have huge lotteries. The Irish lottery is probably one of the best known, but they’re also very big in Spain, Mexico and South American countries.

All of which does absolutely nothing toward answering to the OP’s question. But, it would be interesting to know if someone, somewhere has verifiable studies, by ethnicity, about gambling habits. Maybe the CIA? Or the Nevada Gaming Commission?

Maybe “da Shad-oh know?” < cue background music >
Nah, he just knows “what evil lurks in the heart of man.”