But what actual examples are there of this? Evidence that they actually do this. Facebook has had a number of big stories and leaks showing they sell info on to other parties, but Google seems to sell advertising access rather then the data itself, which is pretty legit to it's policies.
(And while I'd agree they seem to collect data from anything they possibly can, they seem to poorly underuse that data collection as far as I can tell. I use quite a bit of google stuff and their ads profile for me is still a total mess including things I actively hate. If they struggle with not targeting me for things I've told them I hate, it's hard to feel too worried about how they're going to factor in their passive microphone recording data)