As Mark Zuckerberg gave a speech on free speech today, there was something funky happening in the comments on his Facebook Live broadcast.

Zuckerberg waxed philosophical about the importance of the First Amendment, invoking Martin Luther King Jr., the #MeToo movement, and Black Lives Matter, and the comments poured in below his live-streamed video on Facebook. But these comments have a peculiar quality: every single one was positive.

That’s a puzzling response to Zuckerberg’s speech, given that much of it also addresses hate speech and inciting violence. It certainly seems like these aren’t all of the comments people are leaving on Zuckerberg’s video: So far, there are nearly 50,000 of them. Instead, the comments that appear almost universally thank him for what he’s brought into the world.

Zuckerberg’s Facebook presence has long been a heavily curated promotional vehicle for the company—in fact, there’s a whole team devoted to managing it. But the Orwellian irony of watching Zuckerberg opine on the importance of free speech, which is one of Facebook’s most divisive issues, while comments of support pour in, shows just how much power the Facebook CEO has over what we see online.

“I am here today because I believe we must continue to stand for free expression,” Zuckerberg said. Except, maybe, in showing all the reactions of people watching his video.

When asked for a response, Facebook asserted that it did not moderate the comments.

“Thank you and Facebook team for wonderful place to communicate,” reads one. “You made the world smaller and made us closer thank youuuu May god bless you????,” says another. The words “thank you” appear so often that you might think Facebook decided to only show comments with those words, though the company denies that is the case.

