In the article it mentions Wikipedia as an example.

Yes, Wikipedia’s content is available for Google to take and display on its own site. But by not pushing through the traffic Google risks starving it off long term.

I used to work for a very large forum and information site, and as more of our content got picked up by Google’s snippet boxes, the more no-click searches and the corresponding decline in traffic we saw.

Google’s push to increase revenue is slowly but surely killing the golden goose.