I believe whats good about using a different card too, is that when returning the item there is less chances of deducting the points.
As it works like any other "Cashback" site, I doubt they wont take your points away. Have you ever tried returning an item you bought through a cashback link?
Not sure if this is true, as they track you order...
\How can they track it to a diff cc?
When you click through the Chase site to the retailer, your session/visit at the website is tracked. Purchases in that session earn points, and associated returns get taken away. It has nothing to do with the credit card used.
What happens when the website does not talk to the B&M when the return is made? What happens to the tracking?
That would be a loophole. I was responding to the regular case where the question was how it is tracked if not with a CC.
I agree with you. What I am trying to draw attention to without getting out the spoon is the loophole.
Spill the beans!