My first thought on the matter would be novelty. If the consciousnesses of the future sufficiently valued novelty, and if the contents of a brain scan were cons

My first thought on the matter would be novelty. If the consciousnesses of the future sufficiently valued novelty, and if the contents of a brain scan were considered a high-value source of potential novelty, then I can imagine there might be some market for it. But that requires a few massive assumptions including that the kind of novelty that is desirable to a future might be found in the brains of individuals from today and that such novelty could not be generated in some other cheaper manner.