I'd like to say I feel bad for the developers, but I can't. This isn't anything new. Many of us have been saying this for some time now. This isn't any different then the Bikini App situation. Even the article mentions eating the author's own words. What they fail to realize is that Apple's T&C are changeable. They are Apple's, not yours, and they can be whatever they want with no regard for your app.

As a user, this is bad. I don't want to buy an app because I can't rely on it. If Apple should remove it in the future, I lose the functionality I've come to rely on. As a user, I'm not in control of the applications I install. Apple is. This means if Apple suddenly changes it's mind, I lose the application and whatever data it supports.

This is not good for me as a user, and has influenced my buying habits.