It's not open source, but is it free? I'm assuming you have plans on making money off of it somehow, can you share anything about what that will look like?

Yes, it’s free for individual local use, and you don’t need an account.

The upcoming paid plans will be for team/enterprise and managed services: org policy/security controls, shared history/collaboration, and optional hosted infrastructure like a gateway or managed remote access. These will be available when we exit beta.