Remember that guaranteed sign-ups are somewaht problematic since the cpa networks you are in will track your traffic and if it doesn't convert you will be questioned, even banned.

however you can mix this with other leads that convert as stated above, like if you get your net work 200-500 good (converting: making sales, doing whatever they are supposed to do) leads a month, I think you can mix a certain amount of leads that are crappy and make an extra profit, just be careful.

Since I haven't tried it, i'm mostly whitehat with CPA at the moment since business its doing great, .