I looked at some past contracts with Moorings and this is just a guess and could be way off but, I wonder if you received any other discounts and still got the sleep aboard free? My last invoice had the sleep aboard with Moorings and a couple of different discounts because of the Captain's card and another promotion and I paid around the 2/3 that is referenced above. I am wondering if they quote some folks and if they try to "negotiate" a deal they offer the discount or in your case you wanted a sleep aboard and they threw that in there. Because, ironically, my discounts add up to very close to what the sleep aboard was. Found that interesting!