A place where users can clearly identify their own behavioral trends.

That's actually something people would care about. I had a few websites once upon a time. I invested some effort into them. I remember paying attention to the views. I wanted to know how many people were reading my stuff. It wasn't monetized, but it was a matter of ego. I long ago stopped paying attention to those websites. It was a phase. I also had a book writing phase and remnants of that are all over Amazon :) My websites still exist, but I don't even check on them anymore. Still, it's a vanity project I can't yet let go.

I think if you can manage this (wow, the work involved) it might be useful.