Lauren Feiner

In an email thread from 2018, Mosseri checked in with Zuckerberg from paternity leave to try to communicate concerns the Instagram co-founders Kevin Systrom and Mike Krieger had with strategy changes for the app. Mosseri wrote that after catching up with Systrom, it was “hard for me to get a read on what’s going on as the relationship is strained.” He told Zuckerberg, “The core tension seems to be twofold: (1) you believe slowing down Instagram will help more than some others do, and (2) your tolerance for handicapping Instagram is expectedly higher than the Instagram team’s.”

Zuckerberg told Mosseri in a 2018 email that even as Instagram grows to include more public entertainment posts, it “can never exclusively be for public figures or it will cease to be a social product.” Meta has been arguing that the social media market has changed so much that entertainment is a key focus of social apps including Instagram and TikTok, but the email suggests that at least at the time, Meta’s CEO felt that connecting with friends would always need to be remain a core use case.

The Verge’s Editor-in-Chief Nilay Patel gets a shoutout in court when the government plays a clip of Mosseri’s January 2021 podcast interview. In the clip, Mosseri talks about joining Instagram and making changes to the safety and integrity operations. Mosseri says on the stand that he indeed “vaguely remember[s] talking to Nilay.” Here’s part of the transcript from the clip they played in court:

But the team decided to make it a standalone app because they wanted to replicate how within Twitter, replies are as prominent as the original posts — something that’s not typically the case on Instagram. The group decided it would be too confusing to users to squeeze in this different model. “That was a very contentious decision internally,” Mosseri testifies.

That’s how Meta viewed the app when it was evaluating launching a competitor that would eventually be called Threads. The FTC is trying to use Meta’s internal evaluations of Twitter to show that it doesn’t see the primary reason for going to Twitter as connecting with friends and family — and therefore, it’s arguing, in a different market from the one it says Facebook and Instagram monopolize.

Mosseri says the app finds the most success in blending entertainment with interacting with friends. That could look like commenting on a public post about a sporting event and interacting with a friend in the comments, he says. That’s important since Meta noted in documents around 2018 that people were sharing less in their feeds, and public content was increasing. The FTC is trying to point out that even if posting to the apps has declined, there’s still friends and family interaction happening.

The FTC is beginning its questioning of the Meta executive by fleshing out what users want out of Instagram. The testimony will help shape how the judge thinks about the market Meta competes in: a limited market in social media networking to keep up with friends and family, or a broader market including entertainment that encompasses apps like TikTok and YouTube.

Schultz began testifying about how Meta tracked the rise of mobile messaging apps. Mosseri is expected to take the stand tomorrow and we’ll go live again then.

Alex Schultz, who’s worked at Meta for years in growth and analytics, is now testifying. He clarifies during the FTC’s introductory questions that while there are multiple VPs of analytics, he is “the” VP of analytics. While I was across the courthouse covering Apple executive Eddy Cue’s testimony in the Google remedies case, WhatsApp chief Will Cathcart was testifying earlier today, followed by an FTC expert who surveyed users about their main motivations for using various social media apps.