U.S.WorldBusinessArtsLifestyleOpinionAudioGamesCookingWirecutterThe AthleticYou have a preview view of this article while we are checking your access. When we have confirmed access, the full article content will load.Ads from Temu, Shein, ReelShort, DramaBox and Last War, via Meta and Google.Credit...Photo illustration by The New York TimesTemu, Shein, and streaming and gaming apps looking to break into the U.S. market are spending huge sums to get their wares in front of American consumers.Ads ...