I respectfully disagree, on all counts. See "10 Big Myths about copyright explained" :
Some argue that posting to Usenet implicitly grants permission to everybody to copy the posting within fairly wide bounds, and others feel that Usenet is an automatic store and forward network where all the thousands of copies made are done at the command (rather than the consent) of the poster. This is a matter of some debate, but even if the former is true (and in this writer's opinion we should all pray it isn't true) it simply would suggest posters are implicitly granting permissions "for the sort of copying one might expect when one posts to Usenet" and in no case is this a placement of material into the public domain. It is important to remember that when it comes to the law, computers never make copies, only human beings make copies. Computers are given commands, not permission. Only people can be given permission. Furthermore it is very difficult for an implicit licence to supersede an explicitly stated licence that the copier was aware of.
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Both the Authors Guild and the Association of American Publishers (AAP) sued Google over its book search project for much the same issue.
That's a different issue -- they are selling only news service in the same way that ISPs sell news service, not making money off related ads.
Google is actually an advertising company that uses search to generate an audience.
We'll just have to agree to disagree.