I don't want to accuse anyone of anything here but I'm just noticing what's happened on my site.

Over the last six months, revenue from our Amazon affiliate program has fallen by about 75%. What's strange is that during that same time, traffic to our website has increased by over 50%. We've added new book reviews, featured books in newsletters and in general, have done just about everything we can think of to bolster this number. Yet each week it continues to fall.

I'm just wondering if anyone else has noticed similar behavior recently and what they attribute it to.