This happens to me with shopping carts that I never register for but started to enter email. You get a "left something in your cart" discount code. So I've st

This happens to me with shopping carts that I never register for but started to enter email. You get a "left something in your cart" discount code. So I've started to do that on purpose when I can't find a discount for a site, works about 50% of the time. Start to checkout, enter email, get to payment and just close tab. Wait an hour or two.