Wrong! it's much more expensive than the regular boxes, meaning there is some type of demand for it, store can't charge more money than what people are willing to pay, people wouldn't pay more to get poor quality, the reason why people are willing to pay more for this is because this is not so bulky.
I bought these, and will not be buying them again. I know the quality is inferior, I have used them. They are garbage, and I can't tell you why customers buy it. I know you wrote previously about it not being bulky, since it is about 3 inches tall, but other than that, I see no plus for them, and would rather something a little bit taller which is a lot more comfortable.