Originally Posted by
Saturn
Are you not able to see how confused your statements are? If you barter apples for oranges because you like fruit salad, you will find that you're only left with oranges.
The very transparent and traceable nature of card transactions disqualifies them for ML purposes. What your last sentence describes is, in fact, the production of the problem ML wants to get rid of: cash. Throwing GCs into this makes matters only worse. Or are they illegal now?
Anyway, we're getting sidetracked. OP's descriptions suggest nothing along the lines of ML. They may have been caught in a wide dragnet without their own fault. There have been various reports like this recently, and the protestations of innocence are all plausible. I'm not sure if it makes sense for those people to file an arbitration claim.
You are right. We are getting sidelined. Most cruise ship casinos are operated by outside companies, usually not the cruise lines themselves. So I am uncertain as to who actually sees the transactions between the cruise line, operating company and Amex. But I suspect Amex has all the details.They certainly shut him down. And what is he going to arbitrate for? I believe somewhere in that 40 page contract is the terms like....MR points are the property of Amex and may be revoked at any time... or something like that.
I am still wondering if that poster still can sail with that cruise line. (Even if the cruise line's bottom line wasn't hurt by his transactions).
As an aside, a very very interesting article from the WSJ on MLing. (Behind a paywall, but Google is your friend

)
Bags of Cash From Drug Cartels Flood Teller Windows at U.S. Banks