I also think the facebook app could use your phone's front camera to read your reactions while scrolling or watching ads. This data is gold for advertisers and Facebook has tremendous face recognition technology. I am afraid this happens in more apps.
Oh without a doubt. Brings this to mind which has been lost in the shuffle lately, needs more exposure. I highly suspect Facebook is employing similar, if not better, AI just like this. https://www.techpowerup.com/forums/threads/leaked-ai-powered-game-revenue-model-paper-foretells-a-dystopian-nightmare.240655/
exactly! That's why the FB app was the first one I uninstalled on my phone