Tesco effort

Really interesting. New discount in the Tesco shops. You bay a goods and they back to you 1%. For example you bay for 10 pound and return to you loyal card 10 pence. Not too much, but after few weeks you will have several money on your account. If you bay more goods offers will increase, more than 1% maximum 5%. Why are they doing it? Nobody don’t want give you extra money)) How to explain this marketing company? For make the loyal card you need to give you’re: Gender, Age, and Home Address. Use this information managers can make a statistic about what you minimum consumer needs, the advertising successful or not, how to sell for you purchases which more expensive, with high quality. Plus they can, probably illegally, sell this information to the patrol station, tour agency…