An added bonus is that once the software is written, it can continue to work without the involvement of OB1, even if they run out of money and disappear, and even if they turn rogue and start trying to extract fees from every transaction.
It's an open source, decentralised, peer-to-peer system. As long as the peers want to keep using it, they can keep using it.
Open source projects abandoned by founding companies have a better track record than SaaS projects abandoned by founding companies.
Anybody who is interested can maintain it. If it has a large number of people actively using it to conduct business on a daily basis, somebody will maintain it. If it's big enough that lack of maintenance would be a problem, it won't be a problem.
Most of us were working on OB for free before OB1. If OB1 were to fail I think many of us would continue to work on OB either at another OB-based company or just back on our own.
It's an open source, decentralised, peer-to-peer system. As long as the peers want to keep using it, they can keep using it.