Amazon Textbooks

I’ve recently been adding Amazon associate/affiliate links, an Amazon search bar and an astore to one of my guitar blogs. I was surprised to discover this morning that someone had bought 5 engineering textbooks from Amazon (and third party within amazon) yesterday giving me a commision of $22.09! (New textbooks are currently on sale up to 30% and used books up to 90% until February 14, 2009). And my referral rate was bumped up to 6% (from 4%). Not enough to break the bank but something tangible to report. And these weren’t the guitar links I had provided but still got the commission since the customer bought via my site.