What if you go out of business? Will my copy of LinkMachine still work?

Yes. If we go out of business and the central LinkMachine server goes down, the only difference from your point of view would be that you could no longer exchange InstantLinks with other LinkMachine users. That is because the InstantLinks feature uses the central database to connect users. However, LinkMachine would continue to work fine in every other way. This has been tested under real world conditions, while the central server was down for maintenance.