GEN tokens will be used to boost/promote proposals, and if successful promoters are rewarded in GEN tokens. You can think of it as a prediction game. As well, GEN are needed to register organizations in the ArcHives. There is an entire economy built around the GEN tokens, and a direct correlation between the adoption of the stack and the value of the GEN token. As far as adoption is concerned, there's already a few DAOs in the pipeline.