Note that up until your post above we were discussing something that is within Marriott's current rules. You have now interjected something I would say is against their rules (i.e. selling points.)

Gifting points does not equal selling points. So I would expect Marriott to shutdown any and all eBay auctions they find.

But I agree that we will probably continue to disagree on this issue. (Though I have agreed with you on other issues.)