Overall, 21% of U.S. adults say they don't use social media despite having Internet access, and another 10% don't use the Internet at all.
The app, called Infield Chatter, is intended to give the players more of an independent voice online, distinct from the social media presences of their teams.
Marketers are pushing the boundaries on acceptable practices in their social media influencer campaigns - and regulators are pushing back.
A study published in Nature, shows that exercise - specifically running - is "contagious" across online social networks.
Reeling from another gruesome crime video posted on the social network, Facebook is scrambling to explain how new procedures will help ensure that inappropriate content is swiftly removed in future. But it's an open question whether any system based on self-policing by the Facebook community will ever be able to respond fast enough to satisfy critics and advertisers.
Unsurprisingly Pinterest, generally viewed as a female-oriented network, saw the biggest divergence, with 45.4% of teen girls on board, but just 9% of boys.
Administrators are temporarily suspending accounts that fall in these categories and asking users to confirm that they are real people.
The fraudulent accounts ask jobseekers to provide their credit card numbers for spurious job placement fees, or divulge personal information as part of bogus job applications.
In addition to (hopefully) getting a brand's attention, dissatisfied customers who are vocal on social media have received millions in payouts in the UK.
One of the most stringent studies so far is "Association of Facebook Use With Compromised Well-Being: A Longitudinal Study," published in the American Journal of Epidemiology.