It's been around for a while - think I heard about it a couple of years ago, before it was called daygaming.
As for whether it works - yes it can work for some people. What's it doesn't teach you is how to keep a girl interested when you actually go on the date, so you could well get a whole series of dates all of which turn out to be flops.
Well I suspect most folk would like tips on how to interest the gender of their choice to them. Not sure how much folk are willing to pay though. Is it worth me setting up a college ?