Most people who walk into the same store on the same day, expect to pay the same price if they pick out the same item. But its a whole different story for online shoppers.
Many online marketers are changing the price in a flash to capitalize on how much they think youre willing to pay. Theyre gauging it by knowing where you live, what you buy, and estimating how much you make. All of this information is collected from your history on the Internet.
ABC News discovered that companies known as data brokers are putting online shoppers into consumer categories with names like shopping addicts, frugal folks, and high spenders.
How Online Marketers Use Your Personal Data to Set Prices - ABC News