[Derander]

There is probably useful analysis that they can perform in aggregate across all of their users. Perhaps people who read email are more likely to do <x> at a certain time and that signal is only noticeable with more data than you as an individual generate.

[talmand]

Seems that type of analysis is not really helpful in the long run. It should be catering to me, not what it thinks I need based on other people's habits. If my habits are completely different than everybody else's, then the results it provides are almost always off. Then it has to figure things out again solely using me, which it should have done in the first place.