Can I ask what the amount of money that can be made has to do with this? First of all: they make a case against a particular type of advertising, not all of them. While I honestly believe an argument can be made against any type of advertisement, that's not what they're doing. Second: if an industry is based on immoral practices, what do we care if they make a lot of money? It's like saying "we should not go against slavery, it's a $X billions industry". If they make the money by using data the users did not know they were giving, then I don't care how much money they make: they should not be making it.