The social space online changes rapidly. Feedback stays on top of emerging media news so you don’t have to. Here are the top must-read social media articles of the week of July 10, 2011.

The Numbers Behind Google Plus

Google Plus already hit 10 million users this week and according to readwriteweb should hit 20 million by this weekend. It is also estimated that Google+ grew 350% in only 6 days. Google released a statement staying that 1 billion items are shared everyday on Google+ (in contrast to Facebook’s 4 Billion). New members receive invites, which is how the “social project” has grown so quickly despite still being in Beta.

 

 

Spotify Now in U.S.

Popular UK music sharing service Spotify officially launched in the U.S. this week. You must have an invite to access the free version, but if you want to pay for a premium ($4.99) or unlimited ($9.99) version you can listen straightaway. Spotify describes their new venture as “The award-winning music service that’s taken Europe by storm has now come to U.S. shores. Millions of tracks ready to play instantly, on your computer and your phone.” Request an invite here: http://www.spotify.com/us/hello-america

Foursquare does more with Daily Deals

Foursquare is now partnering with companies such as Groupon, Living Social and Gilt Groupe to incorporate daily deals from these sites into their service. Dennis Crowley, CEO at Foursquare, explained that the company would be sharing daily coupons with their users for a cut of the revenue. “We are trying to see if our targeting works and how users will react,” he told the Wall Street Journal. Currently Foursquare does not make any money off merchant-initiated deals. Learn more from the official Foursquare announcement.

-Anna (@alucas9)