My point really was that Carnival does not do different pricing by types of booking (ie PVP, TA, online, Big Box etc). Some can discount off of their discounted structure, but the price offered is the price. At least that has been my experience. In regards to singles and the active discussion on the add ons and whether it is more or less now, we have not booked a single for me to see it. I have quoted some and see and understand the difference (as you said). My gut tells me that it should come out in the wash, but I have neem wrong before (today even). Hope this helps.