The pay what you want model is interesting - I'd like to know how that's working for you!
At the same time though, we've had massive pull from enterprise customers for consulting to go alongside the tool to help them do really good internal collaboration and culture change to a more distributed leadership model, as well as facilitate constituent and stakeholder collaboration. That's been a significant source of income for us.
Overall, the commitment to "pay what you can" has been core to our model and our values, and we're sticking with it, but we're experimenting with interpreting it in different ways. It's very important to us to both be independently financially sustainable, and to give our tool to groups doing great stuff in their communities regardless of their financial means.