Theres a huge network of private surveillance cameras, microphones, and other sensors constantly collecting everyone's information and selling it to whomever can pay, or just straight up giving the feds access to the data.
Also think about all the other cameras that have their eyes on you. Every security camera in large stores feeds back to their corporate cloud storage which is used to build new models on shit like shopper habits, and they're most definitely selling that data. New cars all have cameras and cellular modems in them now too.
There's also these fucking things that have been popping up all over my area. They track every single car that passes them by. Color, make, model, and plate numbers. They insist they're not doing facial recognition as well but it's literally the same technology.
Trying to avoid all of this tracking, online and IRL, is fucking EXHAUSTING and probably futile in the end. On top of that everyone I tell about this shit either say "meh, i know im being tracked and I dont care" or just think I'm a paranoid schizophrenic.