Consumers are impulsive[1], and get a genuine rush from spending money and receiving pretty packages.
Things like listing rank (ie, being the top item in Best Match), eye-catching pictures and low prices, in that order, matter far more than how useful the product is, because the utility of the product itself is irrelevant to this kind of consumer.
[1] Or, more specifically, the consumer dollar is impulsive. Non-impulsive people are far less likely to fritter away their money on cheap retail purchases.