Webcash

A downloadable survey app. 

Has 2 modes, automatic and manual.

In automatic mode the app will operate when your computer is idle by completing tasks for which you are paid. With manual mode you will be prompted when tasks are available.

Webcash will automate survey style tasks online and pay you for it!, So do not sign up with your main email.

Payments made automatically on weekdays via PayPal whenever your account is $0.50 or more.

Webcash also has a referral system however i could not find any information as to how much you can earn via referrals. 

Webcash