"Who are we kidding? Apps are built to earn money. They are a product created to generate profit, and there are a number of ways we can get them to do just that. The simplest, and therefore most common method is ..."
So says a typical email in my inbox. But. It ain't true. Apps are also built because people love to build things. Many, many apps – and websites; and Real Stuff; — are built because people love to built things, and if they didn't have to earn a living they'd still be building things. For some people, earning money is the pesky thing getting in the way of building the apps they'd love to build.