Looks like that is SOME of the necessary code, but since there is no public specification for the Spark server.... it's mostly useless. Anyway, as you say, it's a closed system, David Marcus is going to decide who can run it. Again, similar to like Solana or Tron or something, totally on-point for that kind of top-down ecosystem -- perfect for building the gambling solutions that LightSpark is working on, but totally uncool for serious Bitcoin/Lightning apps.