I understand your concerns here. Fortunately, the features users receive are permanent (for a given install) and we allow free-form responses (some guy actually

I understand your concerns here. Fortunately, the features users receive are permanent (for a given install) and we allow free-form responses (some guy actually wrote "Tweeting for upgrades sucks" in order to get his upgrade - and we're totally cool with that). Mostly importantly, it's been a really interesting experience in metrics, marketing, user feedback etc. Not an especially profitable one, but valuable in our understanding of how this sort of thing can work. -- GymFu Jof