The cryptocurrency ethereum is mentioned here occasionally, and I'm not surprised to see an overlap in interests from that sphere. Vitalik Buterin has recently published a blog post discussing some ideas regarding how smart contracts can be used to enforce superrationality in the real world, and which cases those actually are.
They can follow the advice of any off-the-blockchain computational process if that is to their advantage. They can even audit this advice, so that they don't lose their autonomy. For example, Probabilistically Checkable Proofs are exactly for that setup: when a slow system has to cooperate with an untrusted but faster other. There's the obvious NP case, when the answer by Merlin (the AI) can be easily verified by Arthur (the blockchain). But the classic IP=PSPACE result says that this kind of cooperation can work in much more general cases.
These are just the typical use cases proposed today. In principle, their decision-making mechanism can be anything whatsoever, and we can expect that there will be many of them competing for resources.
The thing that I think makes them interesting from a FAI perspective is the "autonomous" part. They can buy and sell and build stuff. They have agency, they can be very intelligent, and they are not human.
...Okay, that sounded a bit too sensationalist, so let me clarify. Personally, I am much more optimistic regarding UFAI issues than MIRI or median LW. I don't actually argue that DAOs are dangerous. What I argue is that if someone is interested in how very smart, autonomous computational processes could arise in the future, this possible path might be worth investigating a bit.
An unusual feature of an AI of this form is its speed - while the off-the-blockchain subprocesses can run at normal speed, IIRC the blockchain itself is optimistically going to have a block time of 12 seconds. This means you couldn't have a realtime conversation with the AI as a whole, nor could it drive a car for instance, although a subprocess might be able to complete these tasks. Overall, it would perhaps be more like a superintelligent ant colony.