The EFF has a very informative article on corporate surveillance in
all its forms - on the web and in real life [0][1]. It's long but
well worth reading. A lot of it won't be new to many of us on the
small internet, at least in concept. I was certainly aware that all
these forms of tracking existed, but I learned things I did not know
about how the various methods work and the lengths the data brokers
will go to tie behavioral data to a real person.
[0]
https://www.eff.org/wp/behind-the-one-way-mirror
[1]
gopher://republic.circumlunar.space/1/~slugmax/articles/eff-corporate-surveillance