I think this email promo I’ve just received from Amazon after purchasing the replacement filters (first item shown) speaks for itself. I guess if I had bought a kitchen sink or some furniture, they would offer a house as accessory.

Accessorize Your Algorithm, Amazon :-)
Posted on June 2, 2009 ·
Yeahh,, Amazon need to recheck their algorithm to work better and not heart the costumer with their unrelated offers
+1
Their promo emails are sooooo random. They could do a better job at least in monitoring the clickthrough rates.