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Theoretically we can all be tracked by any purchase made except for the ones where we use cash.
We are tracked by cookies,our ip addresses as well, and possibly our MAC addresses.
If I browse many online stores I will often see a list of recently viewed items, and these lists seem to be different on different devices. I used to think it was all about cookies, but now I am thinking that there are several methods.
While I don't like the idea, I have given up worrying about it.
Helen
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