[davismwfl]

I think the reason most people don't pay for privacy on the apps you listed is the value proposition isn't there. e.g they can do it manually cheaper, faster and easier then the app would allow them. So that could be bad app design, bad problem statement or low value to cost. With consumer apps you have to convince people the value of the app is more then what they spend, and consumers are picky. Not to mention you have to stand out in a crowded market, which is an even harder problem in many ways.