Apple’s iOS mobile operating system has long been the darling of the mobile ad ecosystem. It arguably created the space—at least in its modern form—and is benefits seem to just keep coming. Between the iPhone and iPad, iOS accounted for 46.53 percent of mobile publishers’ and developers’ traffic during the second quarter and delivered 61.41 percent of those publishers’ mobile ad revenue, according to a study by Opera Software. The browser maker's mobile ad platform serves more than 35 billion mobile ad impressions per month to 9,000-plus mobile publishe...