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I have been banned from playing at a few establishments.

Just knowing when to raise your bet does a lot to tip the odds in your favor.

And that seems fair, in the same way that it's fair for a store to apply undisclosed quantity limits to a customer who figures out how to combine freely-available coupons to make all their merchandise free.

I actually did something like that once. A store I visited put a link to a survey on its receipt with an offer of $10 off any one item on completion. I completed the survey on my phone, which displayed a barcode they could scan and selected a sub-$10 item. The receipt for my free item had a link to a survey....

I limited myself to a few items I actually had a use for. They would have been well within their rights to cut me off after a while, but certainly not to have me charged with a crime.

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