This cartoon from The Oatmeal blog really summarizes people’s behavior about buying expensive mobile devices but balking at paying $0.99 for an application. Human beings involved in a marketplace are both unpredictably predictable and predictably irrational, which leaves plenty of room for intelligent optimization efforts. Yet much of the research about applications shows people love adding applications to their devices and following the common trend in software they are gravitating toward free. Another evolving trend is that the nature of…