"Because. they haven't seen anything like Facebook before".
In the first part of the hearing, Zuckerberg, 33, revealed that malicious actors had harvested his data on the platform, said Facebook was considering suing Cambridge Analytica, and pushed back on allegations that Facebook censors conservatives.
He said he was among the almost 87 million people whose personal information was improperly shared with political consultancy Cambridge Analytica.
On one point, Zuckerberg undercut his consistent message that Facebook users have control of their data.
Zuckerberg faced tougher questions from House lawmakers over Facebook's stance than during Tuesday's five-hour session in the Senate, where his defence of data sharing was weakly challenged. Facebook data breach has snowballed into a major controversy in India with main political parties BJP and Congress accusing each other of engaging services of Cambridge Analytica to influence elections in the country. Zuckerberg would rather explain how to keep your boss from seeing your Instagram posts from your "sick day".
Day two of the Facebook CEO's grilling in Washington, DC, was more aggressive than the first. Mark Zuckerberg is right where he does not want to be. Facebook's terms of service prohibit Qzzr from managing others ad accounts this way, but they permit offering advertisers the technology.
Let's just hope lawmakers will take the time to check out the photo of Zuckerberg's notes that was snapped by an Associated Press journalist during the hearing today because they contain a very interesting line about the General Data Protection Regulation.
Representative Greg Walden of OR, the House panel's Republican chairman, said Zuckerberg needed to account for "alarming reports of breaches of trust between your company-one of the biggest and most powerful in the world-and its users". They know what the senators didn't ask-which is many somewhat basic questions about the recent scandals Facebook was involved in, and the company's business model. But has the joking around distracted from the reality of how Facebook is eroding our privacy, allowing the purchase of our data and exposing our democracy to exploitation?
So for those who would be willing to pay for Facebook, how much would they be willing to pay?
Rep. Bobby Rush, D-Ill., asked why the burden of security and privacy is placed on the user, and Rep. Orrin Hatch (R-UT) asked what sorts of legislative changes he thinks would help solve the problems exposed in the Cambridge Analytica scandal.
If Zuckerberg doesn't want to talk about this issue in front of lawmakers, it may be because he fears regulation that would curb Facebook's ability to track data on third-party sites.
"As long as there are people sitting in Russian Federation whose job it is to try and interfere with elections around the world, this is going to be an ongoing conflict", the 33-year-old billionaire said as he was prepared to testify again, this time before a House panel.
"My understanding is that a lot of these cases that you're talking about are a coincidence", Mr Zuckerberg said, insisting that neither Facebook or its competitors listen to unauthorised audio.
Zuckerberg clarified on multiple occasions that the company doesn't sell users' data.
Cohen has been running these quizzes for two years, and has worked with 10 advertising clients to reach approximately 4 to 5 million people with ads, he said. Zuck disagreed, pointing out that Facebook has not sold and does not sell data, but Matsui was trying to make the point that perhaps users should have ownership of inferences made from data, too.
Even if you're not logged in, the company can still associate the data with your IP address and all the websites you've been to that contain Facebook code. But he also waxed on about how many people his age and older use Facebook. Zuckerberg said he wasn't sure what that meant, and Eshoo was forced to say she would follow up with written questions. Across the aisle, the most strident criticism from liberals concerned Facebook's failure to protect users' personal information, and the way that the firm's surveillance-based business model did not give users real control over their information, despite Zuckerberg saying otherwise.