Big Free Superstore Application.
Users earn tokens doing surveys which you get paid for.
This is basically the shop from Super Prize slots without the gaming aspect. Users can do free surveys (through Offerpal) which you get paid for and they can use those tokens to buy real products.
There is a demo here: http://apps.facebook.com/bigfreesuperstore/
In the demo I have set offerpal to give me $1 for every four tokens a user is awarded. So to get a major product like the digital camera the user will have to have completed $498 worth of surveys, etc. The camera costs me $140 including drop shipping to the customer no matter where in the world they live!
I’ll give you my drop shipper details when you purchase the app as well. There is no minimum order, no sign-up fee and they ship worldwide.
If you don’t want to get involved with any physical products you could just do gift vouchers which can be delivered by email. For example I have put the amazon.com $100 voucher in the store at 900 tokens – $225 worth of surveys so it will make me a $125 profit.
You can optionally run a referral program that awards users when they invite someone. You can choose to pay just for invites, if the person installs the app or both. I have mine set to award 2 tokens to the referrer when someone they invite uses the application.
The application is also montetized with banner ads from rockyouads (although you can use any ad provider you like).
The application is easy to set up operate.