Of course Big Brother exists. There is more than one
Google has one
Amazon has one
Facebook has one
the NSA has several.
etc etc etc
Step outside your home and walk down the street at least one of the above will get updated.
Buy anything on the Internet and they'll all get busy working out why you did what you did and the first three will make decisions on how to correct your actions and divert you to places where they are prevailing when it comes to surveilance.