these are extremely hard to start making money because when most feel like its a scam so they will stay away but if you could somehow built it up like giftmonkey.com your in for a load of profits ...the scipts that can pull it off can be found @ fsrevolution.com & you can always search in big G for incentive script, good luck.
Most probably just getting you to fill out cpa offers, however if you read the terms they tell you that:
* you need to earn 200 points, and
* out of every 100 people that click on your link, 20 must click no theirs, and
* those 20 must have earned at least 100 points each.
And if they suspect your activity is fraudulent (read if you actually jump through all these hoops and meet these criteria) your earning will be void.
Fairly slim terms aswell.
Stay well clear here. They have made it almost impossible to claim and are just relying on peoples greed and laziness to fill in surveys to get quick prizes.