I know of a few people that are doing variations of what you say.
Many of them engage in illegal and unethical practices - most are elaborate schemes to steal money from advertisers, others steal intellectual property (whatever your stance on that is, it's still either illegal or inmoral).
And, as chipsy says, most of their practices are not sustainable - one guy I know made US$ 2000/month, not daily, and he got busted and is blacklisted by most everyone. Ad networks and others evolve and leave those shady practices behind - a few enterprising blackhats might prosper for a long time, but they probably are good enough to make good money ethically.
The acquaintance I know that does best doing this kind of get-rich-fast schemes is a black-hat marketeer that has and incredible knowledge of people's psychology, and manipulates them into buying crappy ebooks or products (often the hard-to-cancel credit card subscriptions). But even though he's making good money, I think he's very insecure and doesn't live a good life (my girlfriend's sister found his profile on a dating network, and he had to show off his Mercedes and bling, which is IMO a signal of insecurity). As I mentioned, he's good enough he probably would make good money as some kind of marketing consultant, but he decided to go the black-hat way.
I'd rather build a product that helps others, instead of guilt-tripping them into something they do not need.
The one software product I'm putting off building is something I find myself needing often and I know will help others, and while it will take a long time to monetize (if ever), I will feel good doing it. And if it does take off it would be amazing :)