A sibling comment thread makes the observation that proof of work with variable volumes of work set for different groups could be a good system. Like setting the work needed for your newsletter to 0, and complete unknowns take two minutes of CPU time, that sort of thing.
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A sibling comment thread makes the observation that proof of work with variable volumes of work set for different groups could be a good system. Like setting the work needed for your newsletter to 0, and complete unknowns take two minutes of CPU time, that sort of thing.