Mobile flight simulators are a niche market. We can’t expect the same audience as the 100s of thousands casual games on the market. We decided to have our users make a small initial commitment to Infinite Flight in the form of a paid app the same way we are committing to them with content (free and paid) and free feature updates. Our track record on Windows Phone show that we are dedicated to this project and that we are not in this market to make a quick buck; Infinite Flight is not a one time wonder, it is our passion and we want to share it with as many people as possible.
The worrying thing here is their comment on the relative communities. The feedback they received from iOS users in less than a week has significantly outweighed the comments and reports from the Windows Phone community. Especially when you are a small developer team, feedback is essential when working on an 'iterive design' model - that's not somethign that can be cured by a big pile of cash, it just needs Windows Phone to keep on growing to create that environment.
You can read the full interview here.