I was actually thinking more like participants who can offer computational power during periods of no use, accrue reputation the more they contribute, and can use that reputation to offload computation to the cloud. If your PC was not powerful enough to run local LLMs, it would need to contribute a lot more, or perhaps it would just be limited to clouds of people running powerful enough GPUs for the local LLMs being used so they could get an added benefit to leaving it running at night.

An LLM model running over across multiple PCs across the Internet would not really be workable, no, but their product is.