This old chestnut... the get-rich-quick method.
This was what I dreamed of doing for about a year and a half before I settled on creating proper websites. I wouldn't say it's all a scam because I know of people who earn their living from it. I wouldn't simply say it works either. I will say it can work, if you know what you're doing.
The reality is, the method isn't as simple as the gurus make it out to be, or indeed as Zach has described above. It's very difficult to get right without risking a lot of money. That was what always stopped me from fully getting stuck into this method. Although I was attracted to the idea of becoming an IM millionaire at first, I tended to stick to the websites method that Lisa and others practice because it's not so cut-throat.
Sometimes I think about this method and wonder whether I should explore it further, but I always end up retreating to the safe, familiar zone of websites. Probably just as well. It's too risky and unfamiliar, and it's probably harder and less enjoyable work. I'm also not a fan of the sensationalist copy used in most campaigns, and to be honest there's something about the method that just feels more like a dream than reality (it's very hard to explain). Websites are less cut-throat, more fun, more honest, and just seem more real to me.
But to anyone who thinks they can pursue this method with success, go for it.