Quote from CalvinSchwa »Has she tried confirming it experimentally? There is always the chance that she mentioned (for instance) 'rose gold' or whatever, as a result of something else that she had Googled or what-have-you. That is, the things she's brought up in conversation are also things she's looked up at some point on the internet, which is the actual cause of the ads appearing? Maybe you could test it by trying highly-profitable phrases she's otherwise uninterested in and has never looked up, see if multiple ads start to show up.
Otherwise, I shouldn't think this is legal at all. Like, seriously illegal in so many ways. And I would guess that, if it were happening, the companies would've been sued already and it would have been a major media frou-frou. (I prefer not to imagine the alternative.)
She just started to test today. She also just changed her age on facebook to her being born in 1944 not 1991. She was saying random phrases into the phone to provoke the ads. we'll see soon.