If so, what do you think caused the extinction?
Is it that tiers: have too many flies; do not enough time; don't trust the potential swappers to participate or offer up some well tied quality flies; don't want others' flies; don't like the 'themes'; don't want to be bothered or make the commitment; have had a negative experience(s) insofar as 'late' deliveries; or, is/are there some other reason?