Ad spending on Facebook has continued to grow year-on-year despite the difficulties faced by the company and its owner, Mark Zuckerberg. Greg Walden (R-OR) was concerned there are "critical, unanswered questions surrounding Facebook's business model and the entire digital ecosystem regarding online privacy and consumer protection".

Again, a similar unwillingness to answer. "I would appreciate if you do that" said Rep. Duncan.

Matt Stoller is a fellow at an anti-monopoly think tank and said, "That's what this is really about".

All of the information Facebook has compiled on you - whether or not you've released said info to Facebook - is what's known as a Shadow Profile.

However, as the jurisdiction issue clarified in the following years, a Belgium district court eventually ruled that Facebook must end its shadow tracking, delete all the shadow profiles it had illegally created over the years, and comply with European Union privacy laws.

'In retrospect it was a mistake that we didn't audit them, ' the Facebook CEO added, when pressed on the issue.

On Wednesday, the European Union unveiled updated rules that will include giving people the right to ask a company to delete their data that isn't necessary to keep and requiring companies to clearly ask for users' consent before using their data.

In both hearings before the Senate, Zuckerberg only mentioned two kinds of data: the information that people decide to share on the platform, and the data that is automatically collected about people's behavior.

Google's tools were present in three in every five pages loaded, while Facebook's trackers were in a quarter of all page loads.

'Yes that's correct, ' Zuckerberg said.

Zuckerberg repeatedly defended the company's practices, saying that users have control over their own data and decide what to share. Ahead of the hearings, the company announced that not only had Cambridge Analytica improperly gathered data from up to 87 million users-rather than the previously reported 50 million-but also "malicious actors" had exploited the site's search features to collect information from "most" of its two billion users.

With a slight hesitation, Mr Zuckerberg replied: "Yes".

He said that by the end of the year Facebook would have 20,000 people working on security and content review and would also step up use of artificial intelligence to weed out fake accounts and inappropriate content.

"But I think you have to be careful about putting regulation in place".

Facebook is working on a number of things, including deploying new Artificial Intelligence tools that can proactively catch fake accounts that Russian Federation or others might create to spread misinformation.

Sanda said those that had not yet been notified on Facebook could expect something on their newsfeeds in the next few days as to whether or not their data had been "misused".

Interestingly, the company also does something else.

But it wasn't just Mark Zuckerberg that people were paying attention to.

But he maintained that advertising enables Facebook to offer a free service and that targeted ads based on user categories were more acceptable to users, even if they could opt out.

The Federal Trade Commission has power to fine the company millions of dollars or even break up Facebook.

At Wednesday's hearing before the House Energy and Commerce Committee, the Facebook CEO confirmed the company collects information on nonusers. But Zuckerberg has now revealed another fact that is sure to worry anyone who doesn't use Facebook.