When Amazon recently implemented what it calls "efficiency guidelines" in its Amazon Product Advertising API, the online retail giant took some developers by surprise. The change was meant to limit access to sites that did not send buying customers. However, a change to your code is required to ensure that you receive the correct level of access. Those that didn't make the change were subjected to the lowest limits. For some, that meant lost revenue--both to the developer and Amazon.
So far, Paul Hunkin's bot has bought him two sets of camera batteries, a gift bag, a USB extension cord, a 1955 stamped envelope and a smattering of other items. Hunkin, you see, decided to bring an XKCD cartoon to life by programming a bot that automatically purchases cheap items using a New Zealand auction site's Trade Me API... because packages are exciting.