But sort of silly to be advertising you for something you've already bought? They think maybe you liked the bike so much you'll buy another, but only if you see an ad?
And they of course get to repeat the name of the store for you so that you're more likely to think of them the next time you need a related product, even if it's not a basketball. You'll remember that you've seen the name of store X in multiple places, so they must be popular.
To actually track checkouts/purchases correctly so that you don't advertise to those people requires a completely different setup.