jmcquown wrote:

> I was picking up a
> 'party platter' of deli meats and cheeses once. I didn't have one of those
> cards. The cashier had one and scanned it so I could get a discount. So
> much for valid information, eh?

Certainly it's valid. Why do you imagine they want purchase data? They
want to maximize profit, right? So they *aggregate* the sales data
from cardholders to see which combination of discounts leads to the
best margins. Doesn't really matter whose card is used.