Elon Musk alleges Twitter is suppressing Substack, membership

based website that hosts its reporting as "false

"The Twitter Files" journalist and Substack author Matt Tabby announced that

He is leaving the social media platform.

"Substack links have never been blocked" on Twitter, Musk tweeted on Saturday.

The billionaire then alleged, "Matt turned out to be/was an employee of Substack."

On Friday, Twitter added "likes" to tweets mentioning Substack stories.

And started blocking comments and labeling Substack links "unsafe".

In response, Taibbi announced that he was reluctantly leaving the stage,

adding that the changes had made it "unusable" for him.

As of Saturday afternoon, the "unsafe" labels appear to have been removed.