Yeah, YC is funding lots of open source projects. PostHog[0] was in our batch. GitLab, Docker, Mattermost, and CoreOS come to mind as other open source YC companies.
There are a number of businesses we could build around the project. A cloud service or enterprise products/support are the obvious ones. Right now, we're focused on community building, because a potential open source business can't be successful with a healthy open source project.