incentive website question

i had an idea for an ebook to sell. but instead of doing that i thought i'd just make an incentive site and give the ebook away if they completed a set number of offers. I found fsrevolution script but I was wondering if that could be used to just give away one product.

I was also wondering how the hell it even works. my affiliate company allows incentive marketing sites for certain products they promote but how the hell does fsrevolution know when somebody actually completed the offer.

I'm assuming there's nothing else of any value out ther other than fsrevolution so I'll go with that but I'm still stuck on how the thing knows that they've completed an offer and whether or not I can give away just one product instead of all the sites i see using it that allow you to choose multiple products.

i would suggest not to try it, i have never received any incentive, i have completed so many offers. it is a waste of time and your programming also. people just get annoyed nowadays to get anything by completing offers.

you think it would be better just to charge like 10 bucks through paypal then to offer it for free if they complete a few offers. I think i'll do both.