Media companies demand Google pay for news

Portuguese media companies, struggling through the worst recession since the 1970s, are pressing Google to pay for content on its news search engine, echoing similar demands elsewhere in Europe.

I’m not sure I understand the demands by these media companies. Google links to the articles which should bring in traffic to the sites, enabling them to make money. I don’t see any ads on Google News, so it doesn’t appear they are making money from it.