Zach MinersU.S. Correspondent, IDG News Service

Zach Miners covers social networking, search, and general technology news for the IDG News Service, and is based in San Francisco.

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Mobile ads now generate almost 75 percent of Facebook's revenue

Total sales for the first quarter grew by more than 40 percent

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Live streaming apps like Meerkat and Periscope pose legal risks for users

Apps like Meerkat and Periscope can lead users astray of privacy and copyright laws

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Instagram clarifies rules to ban revenge porn

The site also expressly forbids posts with sexual content involving minors.

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Does your wrist itch for an Apple Watch? Go to eBay, but it'll cost you

Marked up Apple Watch models are already available on the e-marketplace, with April and May delivery dates.

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Facebook's still the king of social media among teens

But Instagram and Snapchat don't fall too far behind

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YouTube confirms plans for ad-free subscription service

The price of the service hasn't been revealed, although the plan was disclosed in a YouTube letter to its content partners.

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Facebook releases a standalone Messenger web app

It has many of Messenger's mobile app features, just in a handy Web app format.

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Snapchat's first transparency report reveals hundreds of government data requests

Snapchat said it received 375 requests for user data from U.S. authorities between November and February.

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How Messenger chats factor into what you see in Facebook's News Feed

Engineers shed light on Facebook's ranking algorithm during a talk at F8.

Twitter bans revenge porn and stolen nude photos

Users posting such content will have their accounts locked, the company said.

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Twitter adds more reporting tools to curb abuse and improve safety

Twitter has made it easier to report impersonation, self-harm and leaked private information.

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Twitter improves security for shared accounts

TweetDeck users can give others access to an account without providing the account password.

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Under Armour snaps up MyFitnessPal to become largest health tracker

MyFitnessPal and Endomondo give Under Armour access to a valuable new pot of health data.

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Uber to develop self-driving cars, butting heads with Google

The companies look set to become rivals, with Google reportedly building a ride-hailing app

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Twitter's Vine Kids app is amusing for grownups too

Vine's new kid-oriented app likely has bigger plans.