@themarkup has 15K followers around here, but they deserve many more.
The Markup is a nonprofit journalism site that publishes investigations and tools to hold technology firms to account.
E.g., you can use their tool https://themarkup.org/blacklight to investigate exactly how a site is tracking you.
Or you can read investigations like this one into the police-industrial surveillance complex:
Beyond following, consider donating if you value their work!