Ya, I really don't see how they can justify displaying other people's content. They did the work, but they don't get the clicks or ad revenue or even a chance to keep the user on the site.
I wonder how Google would like it if someone launched a site that when you search, it doesn't display results from its own database, but perhaps just a selection of the best results from Google.
I remember when you would search for an answer, and a small answer would be included in the description under the link, so you wouldn't have to click on it.
Then they started to go away, because no one was clicking on them because they didn't need to.
Now you rarely get the answer without clicking on it.
I always thought that services like Startpage or DDG paid for access to search databases, it maybe some form of revenue sharing. It's not that they're stealing the search results from Bing or Google and repackage them.
I wonder how Google would like it if someone launched a site that when you search, it doesn't display results from its own database, but perhaps just a selection of the best results from Google.