if they were on private album, there would be a point to make: Google can't scan every private album because it would be a very subject about data privacy. <br>But the fact that those files are on public album seems evil. Pubilc albums are scanned (try to upload a movie to a public google photos album, you'll have a highly chance of getting the album removed), so they can remove those albums; they probably just choose not to,(reply>), They already do it for advertising. They probably keep these for plain profit. Remember business is business.