This is _not_ a site ad (I was trying to post a question):

Would book recommendations (even good ones) without any social/freebie/purchase fluff work, or it is just waste of CPU resources (not counting mental ticks required to make this really work)? Is anybody interested in smart book recommendations?

No replies. Perhaps I am naive, but I'd love to hear advice from anybody who is interested enough to try - what does not work?