No, I don't have rewards cards, etc. Aside from my grocery store, I don't shop at any one store regularly enough for the savings to overcome my queasiness about the information gathering. I have had so-called Loyalty Cards in the past, but they didn't increase my loyalty. My opinion is that the stores are instead ripping off the people who don't have them.
There's no need for my grocery store to know that I, personally, use a particular type of condiment or toothbrush. The aggregate sales should be enough to determine what they need to buy and advertise.
None of this should suggest I'm some kind of altruist, except in the sense that I believe in level playing fields. Also, I'm human so some irrationality or self-interest is sometimes OK.
There's no need for my grocery store to know that I, personally, use a particular type of condiment or toothbrush. The aggregate sales should be enough to determine what they need to buy and advertise.
None of this should suggest I'm some kind of altruist, except in the sense that I believe in level playing fields. Also, I'm human so some irrationality or self-interest is sometimes OK.