The Hyperspace team is forking the Sia codebase and will be generating ~3.5B Space Cash to be freely distributed to all Siacoin holders in order to encourage people to learn about and experiment with the Hyperspace network upon public launch.
These Space Cash will be distributed in a ratio of 10 Siacoin (SC) to 1 Space Cash (SPACE). The Space Cash distribution will be based upon a snapshot of the Sia blockchain taken at block 161358, corresponding to approximately the beginning of July 1st, Greenwich Mean Time