"As an experiment, I temporarily pulled the Free app from the App Store over a month ago. Sales of the paid app remain great. Few complaints." What I like most about Arment and Instaper is he experiments with different monetization strategies for his app and API, and shares his thoughts and reasoning with the rest of the world.I think sharing the stories, as we are all figuring this out is important for the industry as a whole, and it is great marketing. Arment says it's not just about the money, it's about the product. And he'll blog in detail about it soon.