Purium operates on a system called "Compression". This basically means that if one member of an organization becomes Inactive, we will treat their account as null, and any commissions that would have been paid to them will instead be paid to the closest Active Member above them.
This can have potentially large consequences if, for instance, the Inactivity of a Member in a certain Leg temporarily shifts some Members from Level 9 to Level 8 instead. This can work the other way, as well. There can be large fluctuations in Group Volume if, for instance, a Member who has been Inactive for several months orders and suddenly, Members who were on Level 8 are on Level 9 instead, and therefore no longer considered when calculating Group Volume.