A pacing platform and functionality allows for controlling the pace of delivery of addressable assets in an addressable asset delivery system (100). The illustrated system (100) generally includes an asset delivery order system (102), a decisioning system (104), UEDs (106) and delivery platforms (108). The system (100) allows for delivery of targeted assets to users of UEDs (106) in connection with asset delivery opportunities of programming provided by one or more program delivery networks (122). The system (100) allows for more even pacing of assets delivered by individual UEDs while still collectively fulfilling the campaigns entered via the order system (102). In addition, the invention allows for operation of the order system (102) so as to avoid accepting campaign requests that likely cannot be fulfilled.