The publisher agreement says "You will not send us more than one Ad Request per end user per page of a mobile property." * What is a "page" in the context of a game? * What if a page stays open for several minutes, wouldn't I be sending a new request from that page every time I refresh the ad? * For a tablet, I want to load two ads at a time (1024x50 landscape size and 726x90 portrait size), display only one at a time (depending on orientation), and refresh them on an individual basis based on screen time. Is this appropriate?