"This Facebook oversight decision is a key litmus test for whether country-sized technology companies can effectively regulate themselves," said Lindsay Gorman, emerging technologies fellow at the nonprofit Alliance for Securing Democracy.
Zuckerberg meanwhile said Facebook has ramped up its efforts "to keep hate and violence off our platform" and offered a proposal to address concerns about liability of online platforms, suggesting that each platform have systems in place to weed out illegal content.
The company also announced in a blog post changes aimed at reducing the reach of groups that break site rules, including showing them lower in algorithmic recommendations and alerting people when they go to join a group that has previously violated policies.
He said newly created groups on any topic would need to wait 21 days before becoming eligible for recommendation in order to give Facebook time to understand how a group would operate.
In 2010, Buffett and Gates launched the "Giving Pledge," which called on billionaires to commit to giving at least half of their wealth to charitable organizations.
The lawmakers, led by House Energy Commerce Committee chairman Frank Pallone, cited reports the ads were shown "next to content that amplified election misinformation" and news about the Capitol siege after January 6.
Yet this was a shock four years in the making - a potential global turning point for regulation of big social media companies that began with Australia's complex, provincial politics in 2017.
If there is a viable rival to Facebook in years to come, its genesis will be the event that occurred in Australia on the 18th of February.
Apple has angrily called the complaints by Spotify and others as "baseless", describing them as sour grapes by companies that do not want to play by the same rules as everyone else.
The appearance of the Facebook and Twitter CEOs could be contingent on them testifying jointly alongside Sundar Pichai, chief executive of Google and its parent company, Alphabet Inc.
Republican lawmakers questioned them about their content moderation decisions while Democrats primarily focused on insufficient actions against misinformation that interfered with the election.
Facebook has discussed making its chief executive, Mark Zuckerberg, available to appear before the House Energy and Commerce Committee, the report added, citing two people. Twitter and its chief, Jack Dorsey, have discussed the same, Politico said, citing one person.
Zuckerberg said in January that he wanted to "turn down the temperature" of political conversations on the social networking site because "people don't want politics and fighting to take over their experience on our services.
Facebook will exempt content from official government agencies and services, as well as COVID-19 information from health organizations from the drill.
"Our product focus now is to develop this community infrastructure beyond feeds and message boards to help people build and run full self-sustaining community institutions," he said.
“My understanding is that that post did not necessarily violate that call to arms policy at the time,” said Zuckerberg, referring to the Kenosha Guard’s calls for people to “take up arms” and defend the city from “evil thugs.”
Zuckerberg acknowledged criticism of Facebook by President-elect Joe Biden but said the company shared some of the Biden team's same concerns about social media