If you were to log in, you'd be able to get more information on your fellow community member.
Just to present a little balance, the books I recommend on my page (http://www.guitar9.com/labelres.html) have gotten less than 10% of Mr. Greenspuns 'hits', but generated over 10 times the income. It would be folly to generalize that all book-recommendation pages will get the same results, something amazon.com tries to drill into all of it's associates.