Data Broker Brags About Having Highly Detailed Personal Information on Nearly All Internet Users

no mercy for surveillance capitalists!

There, all fixed now.

if they’ve managed to consolidate all into one.

This.

We may feel safer with multiple aliases, email addresses, using different browsers, etc. but it's not hard for them to combine data and know exactly what profile belongs to whom.

Not that we shouldn't try, but it's far more difficult for the average user to evade data collection than someone who is online for a very specific purpose (and is covering their tracks with every interaction).

How would they know any of it is accurate?

Doesn't matter. Advertisement has never been about truth.