Why do big corporations including Sainbury's use club card and non- club card prices? This is against a fair price and customer care only trying to get more out of this silly marketing which we will not fell for and will not let corporations monitor our shopping habits on 1-1 level. I simply refuse to buy products where there 2 different prices for 1 product and, where possible, I don't even go to the shops where they have adopted such unfair and discriminatory approach. Don't know why people follow this nonsense and believe they have saved money. Don't let them like to treat us like heard of sheep.