Advertisers What’s bigger: A 2,000 pound whale or a ton of fish? In the wake of DeltaDNA’s recent publishing of its Game Profitability Index (GPI), there’s been much conversation as to what the findings mean. The GPI, which looked at data from 2,500 mobile games beginning in January 2016, unearthed a clear and seismic shift in the market’s deep oceans: the ROI of finding and feeding a whale is now second best to trawling for smaller fish, which, when added up, provide greater total return.