Honestly, I'm not surprised - the most valuable thing most of these applications do is produce lucrative information that big budget marketers would love to sin

Honestly, I'm not surprised - the most valuable thing most of these applications do is produce lucrative information that big budget marketers would love to sink their meathooks into. There is nothing wrong with this business model per say, but doing it without the express consent with your users is wrong and making it personally identifiable is wrong.