The rest of that quote is:

> All social artifacts are stored in Git, and signed using public-key cryptography. Radicle verifies the authenticity and authorship of all data for you.

They're clearly not talking about privacy there.

Is it embarrassing that their private feature was broken? Sure. But it's for the most part a publishing platform. Protecting users against a network adversary who wan't to know what they're publishing isn't exactly core functionality.