There are many ways and advertisements to attract customers, such as jumping prices or falling to the bottom. Such exaggerated language can attract many customers and make them feel that the goods of the merchants are very cheap.
Jumping prices have become a gimmick of commercial propaganda, which makes people have the illusion that goods are cheap and buy goods. In fact, merchants never do business at a loss, and there is no real sale price.
Price jumping is also a poor marketing method. In order to minimize losses, many merchants choose to sell their goods at or below the cost price.