Whenever a product like Facebook exists that seems to be free, it usually means the user is the product that is being sold to advertisers.
Cambridge Analytica, a UK-based voter profiling firm, as well as other analytics companies, obtained data on 87 million Facebook users after a Cambridge University researcher named Aleksandr Kogan created an app to harvest data and passed it along to the firms.
"In general we collect data on people who are not signed up for Facebook for security purposes", Zuckerberg said. Even before the Cambridge Analytica scandal hit the headlines, eMarketer, a market research company, estimated that Facebook will lose 2 million users ages 24 and younger this year. That line nearly worked, until Reps.
With the outrage surrounding Facebook's privacy policies reaching a fever pitch over the past few weeks, there has been something of an underground movement calling for users to delete their Facebook account altogether.
Zuckerberg also said he'd be willing to send suggestions to Graham's office for that right kind of regulation. Zuckerberg agreed: "If there's an imminent threat of harm, we're going to take a conservative position on that and make sure that we flag that and understand that more broadly".
"I hope that Mr Zuckerberg is just as honest as possible, way more honest than he has been in the past with his statements", said Annamarie Rienzi, 22, wearing a #DeleteFacebook T-shirt.
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GETTYWill Facebook launch a new paid-for service?
It will be weeks before Facebook responds to Congress and addresses this issue. Such a system might have the potential to block bad posts before they spread, without humans needing to make subjective decisions in individual cases.
New Mexico representative Ben Lujan asked for Zuckerberg to elaborate on the practice, questioning how many data points Facebook collects on those that haven't even joined the platform.
Countries where the percentage was lower, like Japan, tend to be places where people aren't as likely to use Facebook. He also didn't say how many of those eight might be Facebook's popular subsidiary apps, which include Instagram, Messenger and WhatsApp.
Facebook's headquarters in Menlo Park, California. In one informal online Twitter poll (984 respondents), 83% said they would not pay Facebook in exchange for opting out of ads. "Right there. Not buried in the settings somewhere but right there", Zuckerberg said.
To get there, many Congressmen and Congresswomen have some studying to do.
"We will also no longer allow apps to ask for access to personal information such as religious or political views, relationship status and details, custom friends lists, education and work history, fitness activity, book-reading activity, music-listening activity, news reading, video-watching activity, and games activity", said Facebook in an official statement.