We've posted details on our pre-release pricing strategy. In short, everything is free!
During our pre-release phases (alpha, beta and rc) all the features will be unlimited to all users. After the first stable release, we'll grandfather existing users for one (1) year free of charge on for those services. After that, normal billing will apply.
We will be looking to the community to help us decide on how to make Dropfort a viable tool for all Drupal developers as well as help fund other Drupal related projects with a portion of the earnings.
That's all for now.