Because the god's meal supported the temple's entire staff once redistributed, naptanu was not a purely devotional act set apart from economic life but the mechanism that funded and organized much of it. Administrative tablets from major Mesopotamian temples track the naptanu offerings in the same registers used for taxes, rations and land rents, since supplying the god's table required the temple to manage substantial agricultural estates, herds and breweries, making the daily meal service one of the largest single drivers of temple economic activity across Mesopotamian history.
Prayers accompanying the service, some surviving in temple ritual tablets, addressed the god directly at each course, and failure to maintain the schedule, whether from war, famine or administrative collapse, was recorded in chronicles as an ill omen for the city itself, on a level with the interruption of the Akitu festival. The naptanu therefore functioned simultaneously as devotion, as the redistribution engine of the temple economy and as a running index, in the eyes of contemporaries, of whether a city and its rulers remained in the gods' good favor. Some temple archives distinguish rations owed for the god's own table from rations owed for staff wages in separate ledger categories, evidence that Mesopotamian institutions tracked the divine meal service as a distinct budget line within the temple's wider accounts.