Orth has spelled it out more clearly then I've ever heard it before.
Sign up as per this thread (http://forums.layonara.com/layonara-server/203082-donations-future-nwn.html)below in the following format:
Name
Monthly donation cap
How you could come up with that amount per month if needed
At the end of that, we'll see how many names actually sign on. And you have the caveat of your cap to fall back on if the division of 255 comes out above that. This is kinda where the rubber meets the road folks. I've been hesitant to donate ever since I heard NWN was going away someday, but Orth spelled it out clearly, and if there's some manner of visibility as expressed with the assurance that if we maintain the cost of NWN - I see no reason for us to be arses about it. That and for me, I don't think my servitude/ time investment rationale works any longer.
If we don't have enough gravity in this (i.e. 10 people sign up), then I'm guessing that says enough in study of the investment in NWN.