I really love the "users first" stipulation. We're deliberately building a business that builds what we call respectful software.

I wrote something about those principles last year: http://benwerd.com/2013/05/24/respectful-software/

Known is either SaaS or a self-hosted software application, depending on your needs. As such, we're offering:

* SaaS subscriptions

* Support subscriptions for self-hosted users

* Enterprise support

* Software and support for deploying Known across organizations

* Customizations (eg integrations with learning management systems / enterprise software, etc)

In the future, we will offer:

* Direct sales of content to readers (think Bandcamp)

Right now we're not considering advertising or any kind of tracking-based model.