All Intensive Purposes

When you look at a product listing, Amazon helpfully tells you which items customers ultimately buy after looking at that item. Usually the list makes sense -- other books by the same author or about the same subject, perhaps. And then every once in a while, the results are Delphic. For example, on the page for Alan Palmer's The Baltic: A History, you see:

What do customers ultimately buy after viewing items like this?

43% buy the item featured on this page: The Baltic by Alan Palmer $22.05

23% buy Blood Money : Wasted Billions, Lost Lives, and Corporate Greed in Iraq by T. Christian Miller $16.49

16% buy Jamestown, the Buried Truth by William M. Kelso $18.87

10% buy The Punishment of Virtue : Inside Afghanistan After the Taliban by Sarah Chayes $17.13

7% buy A Pickpocket's Tale: The Underworld of Nineteenth-Century New York by Timothy J. Gilfoyle $17.61

Am I missing some connection here?