> Advertising dollars are far more lucrative if you think you can trust where you're sharing your deepest, darkests...

You mean like a Google search?

If you don't mean a Google search, I'm not sure what you could mean. What could possibly be more intimate than a person's lifelong history of general queries in their pursuit of knowledge and personal identity?

Oftentimes those queries are even natural language sentence fragments that directly convey the person's intentions.

What more are you claiming a company could infer by convincing their userbase that their data remains private?