I don’t believe that credit card companies can see individual itemized groceries. Please correct me if I am wrong. I was thinking that Amazon having information as a direct connection to your food purchases (and general nutritional value thereof) would give more details into nutritional habits that could be linked to medical issues. Ex: products with a lot of sugar for diabetics, products high in sodium for persons with high blood pressure or heart failure, etc. With the more detailed information to be potentially shared with third parties, if it was a health insurance company, I am sure they would gladly use that information not to pay for certain medical treatments that they would usually cover using non-compliance to diet as an excuse.
Ah. I understand. I think I got more caught up in the Amazon part than the biometrics. They seem to be increasingly intrusive.