This week in social media, Facebook CEO Mark Zuckerberg's global connectivity project "Internet.org" came under fire by Net Neutrality advocates, Twitter's Periscope app got in trouble with HBO after users were streaming the first episode of "Game of Thrones," and Tumblr released the fourth generation of its iOS app.

It's time for Social Media Sunday!

Facebook:

Internet.org Criticized on Net Neutrality

Two years ago, Facebook's CEO Mark Zuckerberg launched Internet.org as a charitable-sounding project to connect the billions of people across the globe who don't have access or cannot afford it. Obviously, it wouldn't hurt to introduce more people to Facebook in the process.

Flash forward to now, when it's available in several African countries and just moved into India, drawing criticism from Indian politicos for Internet.org practices that they say are at odds with Open Internet principals (see my editorial on the subject for more details and let me know in the comments there if you agree or disagree).

The tensions led Zuckerberg to take up an Op-Ed column defending his connectivity initiative, and overall, a rare bad week for the big blue social network.

At least for Zuck this week Pew found that teens, including Latinos, still use Facebook the most often, with Facebook-owned Instagram right behind in popularity.

Instagram

Speaking of the popular photo-sharing network, Instagram updated its sometimes-controversial nudity rules to allow for breastfeeding photos, according to the Huffington Post -- though most other forms of nudity, including the most criticized portion banning "some photos of female nipples," are still against guidelines. 

Twitter:

Periscope Continues to Challenge Meerkat

Even with a late launch, video streaming Meerkat rival Periscope continues to be paying dividends to Twitter, according to TechCrunch. Though Meerkat had a lot of buzz out of the gate, particularly at SxSW this year, Periscope is reportedly leading Meerkat by half a percentage point on active monthly users on iOS.

However, Meerkat just released its Android app, according to Android Police, one-upping Periscope on an app launch for the second time. It's an invite-only Beta for the time being though, so it looks like the race for dominance will continue without a clear winner for now.

HBO Fights Back Against Game of Thrones-streaming Periscope Users

They say all press is good press, and that couldn't be more true for Periscope and its parent Twitter. Last week, when Game of Thrones Season 5 returned to HBO (and its new cable-free HBO Now service for the first time), some Periscope users shared streams of the debut episode.

That made the usually casual-on-piracy premium TV network quite angry, and takedown notices promptly went out, according to Ars Technica. It's never good to have early users getting in trouble for illegal activity on the Internet, but Twitter chiefs must have smiled just a bit at reports that it was Periscope, not Meerkat, that was used by so many, and apparently so successfully, to do their dirty pirate work.

Moving Overseas Data to Ireland, to Protect Users from Surveillance

Finally, in the company's relatively good week, Twitter updated its privacy policy, according to BetaNews, effectively moving non-U.S. user data to Dublin, Ireland -- a common European base of American tech companies with relaxed policies, and officially outside of the purview of U.S. surveillance requests, like from the National Security Agency. If you're a U.S. user, your Twitter data is of course still searchable by surveillance authorities, but only officially through court requests.

Tumblr:

Tumblr 4.0 App for iOS Goes Live

Yahoo's bloggy social media service Tumblr just got better for Apple mobile users with the launch of Tumblr 4.0. If you already use Tumblr, you've probably already been notified of the update, which is also available here. The updated app requires iOS 8. Among other goodies, Tumblr 4.0 brings notification center widgets, a new app icon, and the ability to create secondary blogs on-the-go.