I think they're basically counting on two groups of customers moving forward: (those DAZ3d fanatics who will buy their products no matter what) and (new people who have no idea what is going on). Those are the two groups of customers they can milk the most by deleting any negative comment that would help new people make a good decision or discourage a fanatic from buying as a trained reflex reaction. Maybe they're gambling that there are enough people in those two groups to make them wildly profitable. Maybe they are wildly profitable.