I operated a non-profit community and I have been using Coda for nearly a year to build a platform for the whole 100 team members (mostly volunteers) to use and invested a lot into the Coda, I even introduce and share Coda with so many other communities in the network which pickup the platform as well. I told them that Coda will become commercial sooner or later, however they will still have the free tier suitable for current users.
Not seems to be the case here, though.