It's less prevailent and severe, but FOSS sometimes does: https://www.fsf.org/blogs/rms/ubuntu-spyware-what-to-do https://www.fsf.org/blogs/rms/ubuntu-spyware-w

It's less prevailent and severe, but FOSS sometimes does: https://www.fsf.org/blogs/rms/ubuntu-spyware-what-to-do https://www.fsf.org/blogs/rms/ubuntu-spyware-what-to-do https://support.mozilla.org/en-US/kb/firefox-health-report-understand-your-browser-perf https://support.mozilla.org/en-US/kb/firefox-health-report-u... There are probably lots of smaller examples; especially in Android.