

Aside from devices that acknowledge theyre listening all the time there actually isnt any, for undisclosed data collection via microphone specifically. Research has, to my knowledge, never found that to be the case
Researchers have generally explained that they dont need to listen to what you say with a microphone- they collect so much data about you they can accurately model what you’re likely to have any interest in, and when that happens frequently enough confirmation bias takes over.
That being said, yes, that person is having all of their data collected, by meta directly and through cookies tracking them around the web. By google and android. By ai, and other companies. By the tracking images in the emails they open. Etc. Theres lots of evidence for all of those things
And there is evidence for companies having collected data that people didnt concent to, like when google tracked location data that people opted out of sharing (there was a lawsuit) or meta recently ended up in the news for circumventing the sandboxing around the Facebook app to collect mobile web activity in a way they’re not supposed to be able to.



Neither of those sources really disagree with what I said, though I do appreciate you adding the additional context because those things are worth knowing about
None of those are really the widespread, passive, undisclosed listening for advertising data that people imagine there to be and that OP appeared to be asking about. The google and apple lawsuit is about google assistant and siri triggering unintentionally, which is a feature that discloses its always listening which I mentioned at the very beginning
https://www.eff.org/deeplinks/2018/04/facebook-doesnt-need-listen-through-your-microphone-serve-you-creepy-ads old article but the eff is pretty reputable
https://www.cnet.com/tech/services-and-software/features/no-your-iphone-isnt-listening-to-you-heres-but-the-truth-is-even-worse/ from 2025