Twitter: Jack Dorsey is stepping down from his second term as CEO of Twitter

11/30/21 7:00PM

This week Jack Dorsey resigned from his role as CEO of Twitter, marking the end of his second spell running the social media company (the first ended in 2008). Dorsey will hand the reins to Parag Agrawal, who was the company's Chief Technology Officer.

Under Dorsey's most recent reign, Twitter made substantial progress — almost doubling its daily active user base since 2017. But, as always, some investors wanted more, and didn't like that Dorsey was also the CEO of $100bn fintech company Square, or that he wanted to run both companies during a 3-6 month move to Africa.

Leading the charge against Dorsey was Elliott Management, an activist hedge fund, which last year bought a big chunk of Twitter stock (4% of the company), and agitated to have Dorsey removed as CEO. Elliott and others hoped that progress for Twitter would be swifter under new, more focused, management.

In the end, the two sides reached a deal, and Jack stayed on for another 18 months, until this week when he joined the great resignation.

‍**What's next for Twitter?**‍

‍Agrawal will have a wish-list of things to get done in the next 5 years, but in 280-characters-or-less the task is simple: to continue growing the user base, monetize those users more effectively and make it into as few "big tech is bad" headlines as possible.

That last part is probably the hardest, but the second goal has proved tricky also. Twitter's successfully rejuvenated its growth, but despite a lot of effort and investment it just can't squeeze out the revenue from its users that Facebook is able to. Twitter makes around $2 a month per active daily user (estimated). Facebook makes almost $5.

Chris Stokel-Walker

Bot bias

19h

Companies are getting AI chatbots to smear their competitors

The race to influence AI chatbots is leading to some companies to adopt shady competitive tactics.

Tom Jones21h

Prediction markets have, predictably, been given a boost by the summer of sports

Major platforms like Kalshi and Polymarket have seen huge upticks in users of late, thanks in no small part to what’s felt like a recent sporting smorgasbord, with major competitions across hockey, basketball, and soccer soaking up fans’ time (and spending, clearly) at the outset of summer.

While gaming industry groups may not like it, there’s been a huge change in the methods people are using to put money on the big games, with everyone from fortunate NYC bar owners, to a far less fortunate Spanish supporter, turning to prediction markets to try and turn their sports know-how into cold, hard cash.

According to a new report from Adam Blacker for apptopia, that shift might have been even more seismic than imagined in the wake of the NBA and NHL finals and around the 2026 World Cup kicking off.

2026 World Cup Reverses Seasonal Lull for Sports Betting Apps

According to a new report from Adam Blacker for apptopia, that shift might have been even more seismic than imagined in the wake of the NBA and NHL finals and around the 2026 World Cup kicking off.

South by Southwest Conference and Festivals

Gold Tesla Cybercabs are piling up, but they’re not picking up passengers yet

Low-volume production started in April. Now people are noticing them more and more in the wild.

Rani Molla6/15/26

Millie Giles

TAKING ACCOUNTS

6/15/26

Britain announces social media ban for under-16s starting early 2027

The UK government plans to use the same model for the restrictions as Australia — but how successful has that case study been so far?

UK Prime Minister Announces Under-16s Social Media Ban

Jon Keegan6/15/26

Anthropic pulls Fable and Mythos access worldwide after Trump administration bars their use by foreign nationals

Only days after releasing two versions of its next-gen AI model, Anthropic has disabled them for users worldwide.

Anthropic says it received a Friday night order from the Trump administration to suspend access to the models for any foreign national (anywhere in the world) — a group that included some Anthropic employees. In response, the company turned off access to everyone.

Last week, the company released to the public its much-anticipated Claude Fable 5 model (and its restricted version Claude Mythos 5, which is still being tested with trusted partners). Anthropic said in a blog post announcing the action that officials cited national security concerns with the new models, while offering few specific details.

The post said that the government gave the company “verbal evidence of a potential narrow, non-universal jailbreak” of the public Fable 5 model. A jailbreak is a means by which users can evade restrictions built into the code to unlock prohibited functionality. Anthropic downplayed the significance of the attack, and said other major models, such as OpenAI’s GPT-5.5, could also be affected by the technique described.

Fears of these first Mythos-class models being misused are running high, after Anthropic warned the cybersecurity world in May that the advanced cyber capabilities of Mythos have rapidly discovered thousands of vulnerabilities in ubiquitous software, leading to the decision to restrict the full version of the model to a close group of trusted partners for testing.

This morning, Axios reported that Anthropic technical staff have flown to Washington to meet with White House officials to resolve the issue.

The Wall Street Journal is reporting that the Trump administration’s decision to take action against Anthropic was prompted by discussions that Amazon CEO Andy Jassy had with officials, including Treasury Secretary Scott Bessent. According to the report, Amazon researchers said they had been able to evade some of Fable 5’s security restrictions using specific prompts. Amazon is a major investor in Anthropic.

Anthropic is currently suing the US government to fight the Pentagon’s blacklisting of the company on national security grounds.

Statement on the US government directive to suspend access to Fable 5 and Mythos 5