>... developer[s] should seriously consider only building apps based on sustainable revenue models.
You don't need an MBA to know this. His app is competing with some pretty good free apps like Feedly. His screenshots don't sell the app. It's not really a big market. In-app purchase allows a "try before you buy" model. Was there any sustained marketing? Did he appeal to a niche? Maybe he would sell RSS subscription packs for specific areas: lawyers, programmers, biotech, investors, etc.
You don't need an MBA to know this. His app is competing with some pretty good free apps like Feedly. His screenshots don't sell the app. It's not really a big market. In-app purchase allows a "try before you buy" model. Was there any sustained marketing? Did he appeal to a niche? Maybe he would sell RSS subscription packs for specific areas: lawyers, programmers, biotech, investors, etc.