Not commenting on the other stuff but people should get used to the fact that anonymized private data is still private, so a so-called privacy app should not be leaking or disclosing or selling it. It might be LESS invasive than personally identifiable data, but it's not NON-invasive.
Who is willing to pay for it after all? Almost certainly, someone who is up to no good. And if you can think of a way it can possibly be misused, then enabling that misuse is invasive.