The idea of a paid version of Facebook is not entirely new, as it seems to surface every time Facebook faces an advertising crisis.
Congresswoman Anna Eshoo, reading questions from her constituents at a hearing of the House Energy & Commerce Committee, asked Mr Zuckerberg whether his data was "included in the data sold to the malicious third parties".
Facebook CEO Mark Zuckerberg says he didn't set his privacy settings to stop his data being shared. These people who are tracked by Facebook in this way have never entered into agreement with Facebook for this, they never consented to be tracked by Facebook.
Dingell expressed frustration with Zuckerberg's frequent promises to get back to lawmakers later in writing. Buschon explained that he and his mother had a conversation about her deceased brother and later on Facebook, his mother saw a memorial photo collage of her brother come up. You don't know how many apps you need to audit.
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Almost 50 U.S. senators and congressmen grilled Mark Zuckerberg this week about Facebook's political bias.
Zuckerberg couldn't say what data they keep for non-users.
Some of the lawmakers talked to Zuckerberg, 33, as they would their children or grandchildren, and were occasionally befuddled by the complexities of his company.
A poll conducted by Recode and Survey Monkey shows that 56% of Americans don't trust Facebook. At first, people thought that simply logging out of Facebook would stop this sort of tracking, but others soon discovered that it actually didn't work.
What happened with Cambridge Analytica illustrates how our personal boundaries for using that data in the real world are being tested. So a researcher built a personality quiz app under those guidelines, and people used the app - and in doing so, allowed it to harvest anonymized data from their Facebook profiles.
As he did on Tuesday, Zuckerberg made no further promises to support new legislation or change how the social network does business.
Some US lawmakers were particularly concerned about the way Facebook tracks users around the web with the use of like and share buttons, and a hidden script called Facebook Pixel.
Zuckerberg has earlier said Facebook will ensure that its platform is not misused to influence elections in India and elsewhere. The House committee Chairman Greg Walden told reporters he would discuss with his committee holding similar hearings with other technology chief executives. He did not name specific companies. As he said in closing, "I think that may be what this is all about".