Just how do they know the income cohort of their customers? Maybe zip code associated with the credit card used for purchases? Cashiers looking at their clothes and cars?
If you think someone can’t take the information from your credit card receipt and find out a whole lot about you legally including your income (or at least the income you have put on any credit application) you are naive.
When you fill out that credit app, you better believe that information is sold.
Gee, do you suppose the CEO could be lying to his investors?