bitseduce
Unparked accounts are pruned when 25 days have elapsed since the last recorded activity. Parked accounts are pruned when 50 days have elapsed since the last recorded activity. Also they regularly clean out accounts with very low share ratios!
Peasant accounts are pruned after 1 week


biztorrents
Unparked accounts are pruned when 25 days have elapsed since the last recorded activity. Parked accounts are pruned when 50 days have elapsed since the last recorded activity. Also they regularly clean out accounts with very low share ratios!
Peasant accounts are pruned after 1 week

Peasant account in both trackers mean users with a ratio below 0.45