Ross addresses these things in his videos on the initiative. For one, the game doesn't have to be 100% functional, it just has to do a bare minimum.

They might not even need to release server binaries, even. I would think releasing documentation on how the network commication runs, and adding a box to enter a server IP into the client at EOL would be sufficient. The community, if enough people care, would then be empowered to write their own server implementation without needing the reverse engineering step.