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Will google punish such sites? They are also popularly know as social networking sites. Some of them write 2-4 lines on certain topic and link several other topics which are related to their few lines of text. This is like blogging about blogs. Surely these sites have nothing in special but a way to increase the content on their own websites. They don't offer anything special except that this helps visitors to visit several other blogs.
Some sites actually allow to post the entire blog content in their site.
Why is not that a spam?
How much news you can cover in a given time period may lead to spamming if your site covers 1,000s of new topics everyday and your site is about what and owned by who?