Actually we've had several people request the SDK. We have not turned anyone away, we just want to have the chance to discuss the functionality and limitations, and their intended use first. So far no one but Daniil has chosen to release their work publicly, but that's not because we're limiting anyone.
If there are interested programmers who want to experiment with the SDK, we invite them to contact us, by all means! And we regularly mention the availability of the SDK to people in support inquiries when relevant.
As to the busyness of this forum, it ebbs and flows certainly, but in terms of sheer number of posts and topics on average the activity here beats World Creator, World Machine (by a mile), and E-On's main public forums. I'm not sure about Cornucopia, but so much of the discussion on there is about their store items, which aren't exactly directly relevant to the core software discussion. We will hopefully see an uptick in activity with the 4.1 release and SIGGRAPH, but in general environment creation tool discussion is down all across the web (or at least more distributed, e.g. some on Facebook, some here, etc.), and I think we're faring reasonably well by comparison to other apps in the same space. But we certainly share the concern you have, and do keep an eye on it and try to encourage activity as we can, consistently referring people to the forums in support interactions, newsletters, and other communications.
- Oshyan
