I have a suspicion on how they're doing it. Every time this has happened there was a tv around. 1. Use smart TVs to listen for ad relevant keywords. 2. TV manu

I have a suspicion on how they're doing it. Every time this has happened there was a tv around. 1. Use smart TVs to listen for ad relevant keywords. 2. TV manufacturers sell the data to FB. 3. FB gets keywords & geolocation data, combines it with it's won data and voila. You know these 2 FB users where near this place and dog stuff was discussed. Pretty safe and distanced from a scandal and yet very effective.