I think you're going to struggle to see it be a really major source of sales.
You've got the two huge camps on either side of the group of people you actually want.
One one side are the idiots from DP and Warrior who think the only way to make money is to article market or to sell eBooks on how to get rich to each other after buying PLR.
The other side you've got cynical douches (that I love to hang out with) that are simply in this for the money and drive the products that haven't reached a saturation point within their niche.
You haven't given any details on what it is, but I'm getting the feeling it's already going to have major competition from somewhere unless it's for a business that deals specifically in a certain type of product (i.e. the affiliate program for ThinkGeek).
If you're lucky enough and actually fits that description, then your still going to struggle to convince people that genuinely should be using your affiliate program to actually use it.