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US Court Rules Google a Monopoly in 'Biggest Antitrust Case of the 21st Century'.
(www.commondreams.org)
This is a most excellent place for technology news and articles.
You should review your definition of monopoly because it doesn't imply bad behaviour by the party in a monopolistic position, it just means they have enough control over the market to sway it in the direction that they way, may they do it or not doesn't matter and that's exactly the power that Valve has over the PC gaming market, hence why competitors can't succeed and companies end up just closing their platform and making their games available on Steam instead.