Google and Facebook probably don’t selling user information to others. Why would they? It’s their moat. From what I have heard, Google instead sells ad space i

Google and Facebook probably don’t selling user information to others. Why would they? It’s their moat. From what I have heard, Google instead sells ad space in real-time with information about the viewer attached to the ad space - but not the identity of the viewer; real life, online alias, or otherwise. Advertisers then in real time bid for that ad space depending on whether they are interested in the viewer characteristics attached to it - it’s all automated / done by preprogrammed bots.