The reserve is for funding future development, this is to create a long term self funded project. Projects that are not funded rarely last. This project could last a very long time.
The DAO will also vote on all of that stuff, so unless most people believe it will increase the value more, then it won't be released and spent. Even if some of the community reserve was released, it will be capped to only a very small amount at a time, so the reserve will last quite a few years and never flood the market. Expanse on the market is and will remain rare by design, even if some people do not understand it yet as the idea is fairly new using smart contracts in this way.
There is 100k for the team at launch, that will never be dumped, and whatever miners are mining now. Make sure and read the FAQ in the main announcement here if you are interested in understanding the project, thanks!
(I also wrote an article "Introducing Expanse" that explains the basics)
http://expanseofficial.tumblr.com 
