Why Pay Full Price? Stores Give Discounts, Sneak Peeks, Secret Sales; Just Hand Over Personal Databy Martin van Haaren11. May 2011Why Pay Full Price? Stores Give Discounts, Sneak Peeks, Secret Sales; Just Hand Over Personal Data (The Wall Street Journal) Tags:DiscountsENfidelityloyaltyprivacyprivate dataSecret SalesSneak Peeks