bait and switch

a deceptive way of selling that involves advertising a product at a very low price in order to attract customers who are then persuaded to switch to a more expensive product

इस रक्षात्मक रणनीति को अक्सर "चारा और छड़ी" के रूप में जाना जाता है।

This defensive strategy is often referred to as " bait and switch ".