Wall Street has fallen in love with the mobile adtech and gaming company AppLovin.AppLovin's recent push into e-commerce sent its market valuation over the 100billionmilestone.Someadindustryinsidersquestionthesustainabilityofitsrun,however.SharesinthemobileadsandgamingcompanyAppLovinhavebeenrunningwild—andadvertisingindustryinsidershavealotofquestions.AdvertisementAppLovinenteredtheNasdaq100inNovember,withitsmarketvaluesurpassingthe100 billion milestone and ...